ELECTRICAL measurements QUANTITIES AND UNITS Objectives Discuss the SI standard Use scientific notation (powers of ten) to represent quantities Use engineering notation and metric prefixes to represent large and small quantities Convert from one unit with a metric prefix to another Express measured data with the proper number of significant digits Multiple Choice Choose the best response to complete the sentence or answer the question. You will need symbol font on your computer to see the symbol for ohm. This activity contains 27 questions. Which of the following is not an electrical quantity? voltage current distanc e power Current is measured in watts volts henries
Electrical Measurements
Nov 26, 2014
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ELECTRICAL measurements
QUANTITIES AND UNITS
Objectives Discuss the SI standard Use scientific notation (powers of ten) to represent quantities
Use engineering notation and metric prefixes to represent large and small quantities
Convert from one unit with a metric prefix to another
Express measured data with the proper number of significant digits
Multiple ChoiceChoose the best response to complete the sentence or answer the question. You will need symbol font on your computer to see the symbol for ohm.
This activity contains 27 questions.
Which of the following is not an electrical quantity?
voltage
current
distance
power
Current is measured in
watts
volts
henries
amperes
Voltage is measured in
volts
farads
watts
ohms
Resistance is measured in
henries
ohms
hertz
watts
18,000 watts is the same as
18 mW
18 MW
18 kW
18 µW
The quantity 3.3 × 103 is the same as
330
3,300
33,000
0.0033
The quantity 43 × 10–3 is the same as
0.043
0.430
430
43,000
The number 4,500,000 can be expressed as
4,500 × 106
4.5 × 106
4.5 × 10–3
either 4,500 × 106 or 4.5 × 106
14 milliamperes can be expressed as
14 MA
14 µA
14 kA
14 mA
7,000 volts can be expressed as
7 kV
7 MV
7 mV
either 7 kV or 7 mV
The number 65,000 expressed in scientific notation is
0.65 × 104
6.5 × 104
65 × 104
650 × 103
The number 0.0003 multiplied by 10–3 is
0.0000003
0.0003
3
3,000
When these numbers are added, (87 × 105) + (2.5 × 106), the result is
1.12 × 104
11.2 × 105
1.12 × 107
1,120 × 106
When these numbers are multiplied, (6 × 103) (5 × 105), the result is
3 × 108
30 × 108
300 × 109
3,000 × 107
The number 4.38 × 10–3 expressed as a number having a power of 10–6 is
4,380 × 10–6
438 × 10–6
43,800 × 10–6
438,000 × 10–6
What is (79 × 106)/(12 × 10–8)?
6,580 × 1012
658 × 1010
6.58 × 1014
0.658 × 1016
4.4 × 106 ohms expressed using a metric prefix is
4 kΩ
4.4 kΩ
4 MΩ
4.4 MΩ
3.2 × 10–5 A expressed using a metric prefix is
32 µA
3.2 µA
320 mA
3,200 mA
The number of microamperes in 2 milliamperes is
2
20
200
2,000
The number of millivolts in 0.06 kilovolts is
600
6,000
60,000
600,000
The number of megohms in 0.03 kilohms is
0.00002
0.0002
3 × 10–5
either 0.00002 or 0.0002
The number of kilowatts in 135 milliwatts is
1.35 × 10–4
135 × 10–3
0.0135
0.00135
0.16 mA is equal to
16 µA
160 µA
1,600 µA
0.0016 µA
1,600 kΩ is equal to
1,600,000 M
160 M
1.6 M
0.160 M
7,000 nA is equal to
0.007 µA
0.7 µA
700 µA
7 µA
Derived units are obtained from various combinations of
electrical quantities
fundamental units
metric prefixes
international standards
Another name for "fundamental units" is
base units
atoms
the metric system
letter symbols
Fill in the BlanksType the answer that best corresponds to the blank in the sentence. (Note: Give numeric answers to one decimal place.)
This activity contains 17 questions.
Within the question text below, there is one text entry field where you can enter your
answer.
prefixes are used to express large and small numbers.
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answer.
The prefix "tera" equals one .
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answer.
The prefix equals one million.
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answer.
The prefix equals one thousand.
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answer.
The prefix equals one-thousandth.
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answer.
The prefix equals one-millionth.
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answer.
notation represents large and small numbers as a mantissa and power of ten.
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answer.
notation is a form of scientific notation that limits the power of ten to a multiple of three.
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answer.When converting from a larger unit to a smaller unit, move the decimal
point to the .
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answer.
Hertz is the unit of .
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answer.
8,000 volts can be expressed as kV. (Note: Use number answer.)
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answer.
10,000,000 ohms can be expressed as M . (Note: Use number answer.)
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answer.
The exponent of base 10 represents the of 10.
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answer.Moving the decimal point three places to the right is the same as
multiplying by .
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answer.Moving the decimal point five places to the left is the same as dividing
by .
Within the question text below, there is one text entry field where you can enter your
answer.Multiplying the metric prefix "kilo" by the metric prefix "micro" gives
the metric prefix .
Within the question text below, there is one text entry field where you can enter your
answer.Dividing the metric prefix "milli" by the metric prefix "mega" gives the
metric prefix .
Circuit AnalysisPlease type the answer that best corresponds to the blank.
This activity contains 7 questions.
Within the question text below, there is one text entry field where you can enter your
answer.
The number of microamperes in 450 milliamperes is µA. (Note: Use comma in answer.)
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answer.
The number of millivolts in 0.004 kilovolts is mV. (Note: Use comma in answer.)
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answer.
The number of kilowatts in 47,000 W is kW.
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answer.
The number of watts in 6.8 kilowatts is W. (Note: Use comma in answer.)
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answer.
The number of microfarads in 3.2 farads is µF. (Note: Use comma in answer.)
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answer.
The number of microamperes in 6,000 nanoamperes is µA.
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