SP10–11 1 © Pearson Education Ltd 2019. Copying permitted for purchasing institution only. This material is not copyright free. End of Unit Test Higher Name Class Date 1 A student blows up a rubber balloon and rubs it with a woollen duster. The student notices that the balloon sticks to a wall. Explain, in terms of electrostatic phenomena, why this happens. _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ (4) (Total for Question 1= 4 marks) 2 A student wishes to investigate how the current flowing through a filament lamp depends on the potential difference across the lamp. The student selects the following equipment: 12 V d.c. power supply filament lamp variable resistor digital voltmeter connecting wires a State an additional piece of equipment that the student will require. __________________________________________________________________________________ (1) b Draw a circuit diagram showing how the components should be connected. (3)
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SP10–11
1© Pearson Education Ltd 2019. Copying permitted for purchasing institution only. This material is not copyright free.
End of Unit TestHigher
Name Class Date
1 A student blows up a rubber balloon and rubs it with a woollen duster.
The student notices that the balloon sticks to a wall.
Explain, in terms of electrostatic phenomena, why this happens.
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_____________________________________________________________________________________
_____________________________________________________________________________________
_____________________________________________________________________________________
(4)
(Total for Question 1= 4 marks)
2 A student wishes to investigate how the current flowing through a filament lamp depends on the potential difference across the lamp.
The student selects the following equipment:
12 V d.c. power supply
filament lamp
variable resistor
digital voltmeter
connecting wires
a State an additional piece of equipment that the student will require.
__________________________________________________________________________________
(1)
b Draw a circuit diagram showing how the components should be connected.
(3)
SP10–11
2© Pearson Education Ltd 2019. Copying permitted for purchasing institution only. This material is not copyright free.
End of Unit TestHigher
c The student obtains a series of measurements for current and potential difference.
State the dependent variable in this investigation.
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(1)
d How can the student ensure that the results are reliable? Suggest two ways.
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(2)
(Total for Question 2 = 7 marks)
3 Thermistors have high resistances at low temperatures, but as the temperature increases the resistance decreases.
a Which graph shows how the resistance of a thermistor changes with temperature?
Tick one box.
A B C D
Figure 1
(1)
SP10–11
3© Pearson Education Ltd 2019. Copying permitted for purchasing institution only. This material is not copyright free.
End of Unit TestHigher
b Sketch a graph on Figure 2 to show how current varies with potential difference for a diode.
Figure 2
(2)
c Explain why the resistance of a filament lamp increases as its temperature increases.
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(3)
(Total for Question 3 = 6 marks)
SP10–11
4© Pearson Education Ltd 2019. Copying permitted for purchasing institution only. This material is not copyright free.
End of Unit TestHigher
4 A teacher tells a group of students that ‘one volt is equivalent to one joule per coulomb’.
a Justify the teacher’s statement.
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(2)
b i State the equation linking power, current and resistance.
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(1)
ii A kettle is rated at 1200 W.
The resistance of the heating element is 11.5 .
Show that the current flowing through the heating element is about 10 A.
(3)
(Total for Question 4 = 6 marks)
5 Many electrical devices are powered by the mains.
a What is the frequency of the main electricity supply in the UK?
Tick one box.
A 25 Hz
B 50 Hz
C 230 Hz
D 250 Hz
(1)
SP10–11
5© Pearson Education Ltd 2019. Copying permitted for purchasing institution only. This material is not copyright free.
End of Unit TestHigher
b A device is plugged into the UK mains supply and switched on.
i What is the potential difference between the live wire and the neutral wire?
Tick one box.
A 0 V
B 50 V
C 230 V
D 500 V
(1)
ii What is the potential difference between the neutral wire and the earth wire?
Tick one box.
A 0 V
B 50 V
C 230 V
D 500 V
(1)
c Explain the function of an earth wire in ensuring safety when using an appliance.
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(3)
(Total for Question 5 = 6 marks)
6 An electric current is a flow of charged particles.
A current flows through a metal wire.
a State the name of the charged particles that flow through the wire.
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(1)
b i State the equation linking charge, current and time.
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(1)
SP10–11
6© Pearson Education Ltd 2019. Copying permitted for purchasing institution only. This material is not copyright free.
End of Unit TestHigher
ii A current of 480 mA flows through a resistor.
Calculate how much charge flows through the resistor in 2.0 minutes.
(3)
(Total for Question 6 = 5 marks)
7 Many metallic objects, such as bicycle frames, are painted using sprayed paint.
Crops growing in large fields are often sprayed with insecticide.
Compare and contrast the ways in which electrostatics is used when spray painting and spraying insecticide.
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(6)
(Total for Question 7 = 6 marks)
TOTAL FOR PAPER = 40 MARKS
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