Basic Electricity 30 Hour - Part 1 Student Workbook · Basic Electricity (30 hour) - 73.14 Student Workbook LJ Technical Systems SW1.3 Supporting Diagrams Assignment 3 Dangers of

Basic Electricity30 Hour - Part 1Student Workbook

Issue: US140/30/2a-IQ-0402A

Copyright 2004, LJ Technical Systems. No part of thisPublication may be adapted or reproduced in any material form,without the prior written permission of LJ Technical Systems.

Written by: LJ Technical Dept

Basic Electricity (30 hour) - 73.14 Student Workbook

LJ Technical Systems SW1.1

Assignment 1 Static Electricity

Complete the diagrams with the appropriate charges on the swinging balls.

Complete the statement about charges.

Like charges ___________ and unlike charges _____________.

Explain why your hair may stand on end when you take off a sweatshirt..............................................................................................................................................................................

.............................................................................................................................................................................

.............................................................................................................................................................................

.............................................................................................................................................................................

.............................................................................................................................................................................

.............................................................................................................................................................................

.............................................................................................................................................................................



Explain how you think lightning is generated. The space is provided for a diagram.

......................................................................................................

......................................................................................................

......................................................................................................

......................................................................................................

......................................................................................................

......................................................................................................

......................................................................................................

......................................................................................................

......................................................................................................

......................................................................................................

......................................................................................................

......................................................................................................

Assignment 2 Uses of Electrostatics

Complete a detailed description in your own words of an application that uses electrostatics.Use diagrams where necessary to support your description.

Application: .................................................

..............................................................................................................................................................................

..............................................................................................................................................................................

..............................................................................................................................................................................

..............................................................................................................................................................................

..............................................................................................................................................................................

..............................................................................................................................................................................

..............................................................................................................................................................................

..............................................................................................................................................................................

..............................................................................................................................................................................

..............................................................................................................................................................................

..............................................................................................................................................................................

..............................................................................................................................................................................



Supporting Diagrams

Assignment 3 Dangers of Electrostatic Charge

Draw a labeled diagram in the space below to show how static electricity caused the incident.



Assignment 4 Electric Current

Describe what you think is happening when you place the capacitor in the circuit with thebattery, in the circuit with the lamp and in the short circuit.

.............................................................................................................................................................................

.............................................................................................................................................................................

.............................................................................................................................................................................

.............................................................................................................................................................................

.............................................................................................................................................................................

.............................................................................................................................................................................

.............................................................................................................................................................................

.............................................................................................................................................................................

Describe what you think is happening when the capacitor is added to the circuit below.

°F12V

...........................................................................................................

...........................................................................................................

...........................................................................................................

...........................................................................................................

...........................................................................................................

...........................................................................................................

...........................................................................................................

...........................................................................................................

...........................................................................................................

...........................................................................................................

...........................................................................................................

...........................................................................................................



Assignment 5 Voltage

Complete the diagram to show voltage readings.

6V

Assignment 6 Resistance

Complete the table below with the measured resistance value for each component on the BasicElectricity trainer.

Component Resistance Value (Ohms)Generator/MotorRelay CoilResistorHeaterLamp LP1Lamp LP2Lamp LP3Switch S3 OpenSwitch S3 Closed



Assignment 7 Relationship Between Voltage, Current,and Resistance

Record the values for circuit measurements.

Voltage = .................................

Current = ..................................

Resistance = .............................

Complete the table with the calculated and measured current values for the specified resistorvalues for the following circuit.

Diagram - Circuit to test Ohm's law and Ohm's law triangle

1.5 volt BatteryResistor Value (Ω) Calculated Current (amps) Measured Current (amps)

15

1050

100

6 volt BatteryResistor Value (Ω) Calculated Current (amps) Measured Current (amps)

15

1050

100



9 volt BatteryResistor Value (Ω) Calculated Current (amps) Measured Current (amps)

15

1050

100

Assignment 8 Cells in Series

Draw a schematic diagram of a flashlight circuit in the space provided, labelingeach component.

Complete the table with readings from the circuit.

Number of Batteries Voltage (volts) Current (amps)1234



Assignment 9 Batteries in Parallel

Complete the tables with the results of your experiment.

Series Circuit Parallel CircuitNumber ofBatteries Voltage Current Voltage Current

1234

Complete the table with the results of your experiment with varying numbers of batteriesin parallel.

A1 A2 A3

Number ofBatteries

Current A1 Current A2 Current A3

123

Assignment 10 Switches

Draw a schematic diagram of the circuit with a lamp and single toggle switch.



Draw a schematic diagram of the circuit with a lamp and two toggle switches in series.

Complete the series circuit table.

SwitchS3 S4 Lamp

Open Open OffOpen ClosedClosed OpenClosed Closed

Complete the diagram of a single pole double throw switch circuit.

1.2

12V

1.8

B1

B2

1.52

1.51

1.49 1.45

1.47

LP2 LP1

1.29 S5 1

2 1.34

1.32

+



Copy the two way house lighting circuit into the space provided.

Assignment 11 Switches in Parallel

Complete the diagram to show the switches connected in parallel.

1.3 _ 1.4

1.1 + 1.2

+ -

B16V

BATTERIES LAMPS

1.19

1.21

S1

SWITCHES

1.15

S2

S31.22

1.16

1.201.17 1.18

1.13 1.14

1.23 1.24

PUSH TO BREAK

CLOSED

1.47 1.48

1.49 1.50

1.51 1.52

1.45 1.46

1.7 _ 1.8

1.5 + 1.6

+ -

B26V

LP1

LP2

OPEN 1.53 1.54

1.55 1.56

LP3

PUSH TO MAKE

1.25S4

1.26 1.27 1.28

CLOSED

OPEN

1.29S5

1.30

1.31 1.321

2

1.33 1.34

Complete the parallel circuit table.

SwitchS3 S4 Lamp

Open Open OffOpen ClosedClosed OpenClosed Closed



Assignment 12 Resistors in Series

Describe how you calculate the total resistance of a set of series connected resistors.

........................................................................................................................................................

........................................................................................................................................................

........................................................................................................................................................

........................................................................................................................................................

........................................................................................................................................................

........................................................................................................................................................

........................................................................................................................................................

........................................................................................................................................................

Complete the table to show the measured values of resistance from the trainer.

Connection Points Resistance in Ohmsa to bb to cc to dd to ea to e

Calculated a to e

A

12V

100Ω

80Ω 60Ω

Use this space to perform any working out required.



Assignment 13 Resistors in Parallel

Write the formula and the example for equal value resistors in parallel in the space provided.

Write the formula and the example for unequal value resistors in parallel in thespace provided.

Use the following space for any calculations you need to make.



Assignment 14 Switching with Light

Complete the circuit diagram of the light sensor circuit.

1.3 _ 1.4

1.1 + 1.2

+ -

B16V

BATTERIES BUZZER

1.19

1.21

S1

SWITCHES

1.15

S2

S31.22

1.16

1.201.17 1.18

1.13 1.14

1.23 1.24

PUSH TO BREAK

CLOSED

1.74

1.75

1.76

1.73

1.7 _ 1.8

1.5 + 1.6

+ -

B26V

BZ1

OPEN

PUSH TO MAKE

1.25S4

1.26 1.27 1.28

CLOSED

OPEN

1.29S5

1.30

1.31 1.321

2

1.33 1.34

+

_

LIGHT - ACTIVATED

1.65 1.66

1.63 1.64

1.67 1.68

SWITCH

SENSOR

Complete the circuit diagram of the modified light sensor circuit.

LIGHT - ACTIVATED

1.65 1.66

1.63 1.64

1.67 1.68

SWITCH

SENSOR

LAMPS

1.47 1.48

1.49 1.50

1.51 1.52

1.45 1.46 LP1

LP2

1.53 1.54

1.55 1.56

LP3

1.19

1.21

S1

SWITCHES

1.15

S2

S31.22

1.16

1.201.17 1.18

1.13 1.14

1.23 1.24

PUSH TO BREAK

CLOSED

OPEN

PUSH TO MAKE

1.25S4

1.26 1.27 1.28

CLOSED

OPEN

1.29S5

1.30

1.31 1.321

2

1.33 1.34

1.3 _ 1.4

1.1 + 1.2

+ -

B16V

BATTERIES

1.7 _ 1.8

1.5 + 1.6

+ -

B26V



Assignment 15 Heating

Complete the circuit diagram for the home heating system.

HEATER AND THERMOSTAT

1.79 1.80

1.77 1.78

1.81 1.82

1.19

1.21

S1

SWITCHES

1.15

S2

S31.22

1.16

1.201.17 1.18

1.13 1.14

1.23 1.24

PUSH TO BREAK

CLOSED

OPEN

PUSH TO MAKE

1.25S4

1.26 1.27 1.28

CLOSED

OPEN

1.29S5

1.30

1.31 1.321

2

1.33 1.34

1.3 _ 1.4

1.1 + 1.2

+ -

B16V

BATTERIES

1.7 _ 1.8

1.5 + 1.6

+ -

B26V

1.83 1.84

1.85 1.86SENSORHEATER

LAMPS

1.47

1.49

1.51

1.45 LP1

LP2

1.53

1.55

LP3

1.46

1.48

1.50

1.52

1.54

1.56

Complete the table with your results (see how to complete your table if you are unsure how tocomplete it).

Status Time On/Off Duration(seconds)

On 1 startOff 1 start On: Off 1 time – On 1 timeOn 2 start Off: On 2 time – Off 1 timeOff 2 start On: Off 2 time – On 2 timeOn 3 start Off: On 3 time – Off 2 timeOff 3 start On: Off 3 time – On 3 timeOn 4 start Off: On 4 time – Off 3 time



How to complete your table

Example table

Status Time On/Off Duration(seconds)

On 1 start 0.00Off 1 start 1 min 12 sec On: 72 Off 1 time – On 1 timeOn 2 start 2 min 30 sec Off: 78 On 2 time – Off 1 timeOff 2 start 3 min 45 sec On: 75 Off 2 time – On 2 timeOn 3 start 5 min 04 sec Off: 79 On 3 time – Off 2 time

In the example, the heater is on as the stopwatch is started. When the stopwatch showed 1 min 12 secs, theheater switched off. When the stopwatch showed 2 min 30 secs, the heater switched on again. This processis repeated to fill the table.

The duration is calculated by the difference between the on and off times.To calculate how long the heater is off for the first time, calculate the difference between when it switchedoff (Off 1) and when it switched on again (On 2).On 2 was at 2 min 30 sec, Off 1 was at 1 min 12 sec.The difference between these is 1 min 18 sec (78 seconds).

Write notes on resistance.

........................................................................................................................................................

........................................................................................................................................................

........................................................................................................................................................

........................................................................................................................................................

........................................................................................................................................................

List household items that produce heat from electricity.

1) .........................................................................................................................................................................

2) .........................................................................................................................................................................

3) .........................................................................................................................................................................

4) .........................................................................................................................................................................

5) .........................................................................................................................................................................

6) .........................................................................................................................................................................

7) .........................................................................................................................................................................

8) .........................................................................................................................................................................

Basic Electricity30 Hour - Part 2Student Workbook

Issue: US140/30/2b-IQ-0402A

Copyright 2004, LJ Technical Systems. No part of thisPublication may be adapted or reproduced in any material form,without the prior written permission of LJ Technical Systems.

Written by: LJ Technical Dept



Assignment 16 Conductors and Insulators

Complete the table to show the conductivity of sample materials.

Material Material Type Conductor / InsulatorCopper MetalBrassSteelAluminumNylonPVCAcrylicRubberHardboardSoftwoodHardwoodCeramicFiber Glass

Write a conclusion about the relationship between material and conductivity..........................................................................................................................................................

.........................................................................................................................................................

.........................................................................................................................................................

.........................................................................................................................................................

Complete the table to show if the objects are conductors or insulators and make any notes youfeel are necessary.

Object Conductor or Insulator(Circle one) Notes

Crayon Conductor InsulatorEraser Conductor InsulatorPaper Conductor InsulatorWood block Conductor InsulatorPlastic spoon Conductor InsulatorMetal scissors Conductor InsulatorMetal paper clip Conductor InsulatorWrench Conductor InsulatorGold ring Conductor InsulatorCoin Conductor InsulatorPencil Conductor InsulatorPickle Conductor Insulator



Assignment 17 Alternating Current

Complete the table with current readings.

Connection point Current reading (mA)1.59abcde1.58

Draw a graph of current readings.



Draw a graph to show alternating current cycles.

-

Assignment 18 Protective Devices 1

Complete the table to show the effect of using fuses in a circuit.

Note: For effect on the lamp, choose between 'stays on', 'goes off' or 'blows up'.For effect on the fuse, choose between 'remains intact' and 'burns out'.

Fuse value Effect on lamp Effect on fuseNo fuse1 amp1.5 amps2 amps3 amps4 amps5 amps7.5 amps10 amps



Complete the table to show the effect of using circuit breakers in a circuit.

Note: For effect on the lamp, choose between 'stays on', stays off' or 'blows up'.For effect on the circuit breaker, choose between 'remains on' and 'trips'.

Circuit breaker value Effect on lamp Effect on circuit breakerNo circuit breaker1 amp2 amps5 amps10 amps

Assignment 19 Protective Devices 2

Describe the different types of GFCI.

Receptacle Type........................................................................................................................................................

........................................................................................................................................................

........................................................................................................................................................

........................................................................................................................................................

........................................................................................................................................................

........................................................................................................................................................

........................................................................................................................................................

........................................................................................................................................................

Circuit Breaker Type........................................................................................................................................................

........................................................................................................................................................

........................................................................................................................................................

........................................................................................................................................................

........................................................................................................................................................

........................................................................................................................................................

........................................................................................................................................................

........................................................................................................................................................



Portable Type........................................................................................................................................................

........................................................................................................................................................

........................................................................................................................................................

........................................................................................................................................................

........................................................................................................................................................

........................................................................................................................................................

........................................................................................................................................................

........................................................................................................................................................

........................................................................................................................................................

Draw a diagram to show how double insulation works.

Assignment 20 Magnetism

Complete the diagram showing the magnetic field lines round your magnet.

S N



Complete the diagram showing the magnetic field lines round your magnet.

S N SN

S N S N

Assignment 21 Electromagnetic Fields

Complete the diagrams to show the magnetic field lines that have been generated roundthe wire.



Complete the diagram to show the magnetic field lines around the coil.

Assignment 22 Relays

Write the current measurements in the relay circuit.

Current in the switch part of the circuit = ...................................amps

Current in the motor part of the circuit = .....................................amps



Design your circuit on the diagram below.

1.3 _ 1.4

1.1 + 1.2

+ -

B16V

BATTERIES

1.7 _ 1.8

1.5 + 1.6

+ -

B26V

GENERATOR / MOTOR

1.9 1.10

1.11 1.12

RELAY1.361.35

1.381.37

1.441.43

1.421.41

1.401.39

1.19

1.21

S

1

SWITCHES

1.15

S2

S31.22

1.16

1.201.17 1.18

1.13 1.14

1.23 1.24

PUSH TO BREAK

CLOSED

OPEN

PUSH TO MAKE

1.25S4

1.26 1.27 1.28

CLOSED

OPEN

1.29S5

1.30

1.31 1.321

2

1.33 1.34

RESISTOR

1.58

e

d

1.57

1.59

1.60

1.61

1.62

c

b

a

BUZZER

1.74

1.75

1.76

1.73

BZ1

+

_

1.65 1.66

1.63 1.64

1.67 1.68

SENSOR

LP4 LP5

INDICATORS

1.70

1.71

1.72

1.69


1.79 1.80

1.77 1.78

1.81 1.82

1.83 1.84


LAMPS

1.47

1.49

1.51

1.45 LP1

LP2

1.53

1.55

LP3

SWITCHLIGHT - ACTIVATED

1.46

1.48

1.50

1.52

1.54

1.56

Describe how your circuit operates.........................................................................................................................................................

........................................................................................................................................................

........................................................................................................................................................

........................................................................................................................................................

........................................................................................................................................................

........................................................................................................................................................

........................................................................................................................................................



Assignment 23 Uses of Electromagnets

Complete the table to show how much mass the electromagnet can support.

Number of turns of coil Masses lifted using 1 battery pack Masses lifted using 2 battery packs02507501000

Label the diagram of the speaker.

Label the diagram of the maglev track.



Label the diagram of the television tube.

Assignment 24 The Electric Motor

Show the points of Fleming's Right Hand Rule.

Complete the table with your current measurements in the appropriate columns.

Test Position Motor Stationary Current (A) Motor Rotating Current (A)abcde



Draw a schematic diagram of the desk fan circuit.

Assignment 25 Electric Generators

Write down the generator principle.........................................................................................................................................................

........................................................................................................................................................

........................................................................................................................................................

Complete the circuits around the magnets to show electrical current being produced.



Draw a diagram to show one method of producing electricity that includes the use ofa generator.

Assignment 26 Transformers

Draw a diagram of a step-up transformer and a step-down transformer.

Step-up transformer Step-down transformer

Draw a diagram of one particular electricity production technique that involves the use ofa transformer.



Assignment 27 Electrical Power

Write down the measurements you have taken for current and voltage.

Current through heater .................................................................ampsVoltage across heater ...................................................................volts

Power = Voltage x Current

Power of heater ....................................................................................................................................................watts

Write down the formula for calculating energy in the space below.

Complete the information relating to the appliances.

Appliance 1Description:Rating:Usage:Energy used per month:






Assignment 28 Paying for Electricity

Complete the dial meter diagram with the reading 23695 as shown in the example in yourassignment guide.

0 98

765

43

210 1

2

345

67

890 9

8

765

43

210 1

2

345

67

89 0 1

2

345

67

89

Complete the dial meter diagram with the reading 37204.

0 98

765

43

210 1

2

345

67

890 9

8

765

43

210 1

2

345

67

89 0 1

2

345

67

89

Use the following space for any calculations you need to make.



Write down the tips for saving energy.

1) ...................................................................................................................................................................

...................................................................................................................................................................

2) ...................................................................................................................................................................

...................................................................................................................................................................

3) ...................................................................................................................................................................

...................................................................................................................................................................

4) ...................................................................................................................................................................

...................................................................................................................................................................

5) ...................................................................................................................................................................

...................................................................................................................................................................

6) ...................................................................................................................................................................

...................................................................................................................................................................

7) ...................................................................................................................................................................

...................................................................................................................................................................

8) ...................................................................................................................................................................

...................................................................................................................................................................

9) ...................................................................................................................................................................

...................................................................................................................................................................

Complete the table to show the monthly average kWh usage.

Appliance Wattage(typical)

Hours of use(monthly average)

kWh(monthly average)

Air conditioner (6000 BTU) 750 720Clothes dryer 5000 25Clothes washer 500 40Computer 200 160Hair dryer 1000 10Kettle 1500 18Television 200 390Video recorder 40 200Water heater 3800 130



Assignment 29 Problem Solving, Part 1

Use the following layout to design your circuit for the problem solving exercise.

1.3 _ 1.4

1.1 + 1.2

+ -

B16V

BATTERIES

1.7 _ 1.8

1.5 + 1.6

+ -

B26V

GENERATOR / MOTOR

1.9 1.10

1.11 1.12

RELAY1.361.35

1.381.37

1.441.43

1.421.41

1.401.39

1.19

1.21

S

1

SWITCHES

1.15

S2

S31.22

1.16

1.201.17 1.18

1.13 1.14

1.23 1.24

PUSH TO BREAK

CLOSED

OPEN

PUSH TO MAKE

1.25S4

1.26 1.27 1.28

CLOSED

OPEN

1.29S5

1.30

1.31 1.321

2

1.33 1.34

RESISTOR

1.58

e

d

1.57

1.59

1.60

1.61

1.62

c

b

a

BUZZER

1.74

1.75

1.76

1.73

BZ1

+

_

1.65 1.66

1.63 1.64

1.67 1.68

SENSOR

LP4 LP5

INDICATORS

1.70

1.71

1.72

1.69


1.79 1.80

1.77 1.78

1.81 1.82

1.83 1.84


LAMPS

1.47

1.49

1.51

1.45 LP1

LP2

1.53

1.55

LP3


1.46

1.48

1.50

1.52

1.54

1.56

Describe how your circuit will operate........................................................................................................................................

.......................................................................................................................................

.......................................................................................................................................

.......................................................................................................................................

.......................................................................................................................................

.......................................................................................................................................

.......................................................................................................................................

.......................................................................................................................................

.......................................................................................................................................

.......................................................................................................................................



Assignment 30 Problem Solving, Part 2

Make any necessary notes on the testing and evaluation of your circuit........................................................................................................................................

.......................................................................................................................................

.......................................................................................................................................

.......................................................................................................................................

.......................................................................................................................................

.......................................................................................................................................

.......................................................................................................................................

.......................................................................................................................................

.......................................................................................................................................

.......................................................................................................................................

Use the following layout to design your modified circuit for the problem solving exercise.

1.3 _ 1.4

1.1 + 1.2

+ -

B16V

BATTERIES

1.7 _ 1.8

1.5 + 1.6

+ -

B26V

GENERATOR / MOTOR

1.9 1.10

1.11 1.12

RELAY1.361.35

1.381.37

1.441.43

1.421.41

1.401.39

1.19

1.21

S

1

SWITCHES

1.15

S2

S31.22

1.16

1.201.17 1.18

1.13 1.14

1.23 1.24

PUSH TO BREAK

CLOSED

OPEN

PUSH TO MAKE

1.25S4

1.26 1.27 1.28

CLOSED

OPEN

1.29S5

1.30

1.31 1.321

2

1.33 1.34

RESISTOR

1.58

e

d

1.57

1.59

1.60

1.61

1.62

c

b

a

BUZZER

1.74

1.75

1.76

1.73

BZ1

+

_

1.65 1.66

1.63 1.64

1.67 1.68

SENSOR

LP4 LP5

INDICATORS

1.70

1.71

1.72

1.69


1.79 1.80

1.77 1.78

1.81 1.82

1.83 1.84


LAMPS

1.47

1.49

1.51

1.45 LP1

LP2

1.53

1.55

LP3


1.46

1.48

1.50

1.52

1.54

1.56

Basic Electricity 30 Hour - Part 1 Student Workbook · Basic Electricity (30 hour) - 73.14 Student Workbook LJ Technical Systems SW1.3 Supporting Diagrams Assignment 3 Dangers of

Documents