Electric Circuits Random Retrieval

This quiz contains all the questions in the Electric Circuits section. The website will pick 10 questions at random.

1 / 10

The unit of charge is the coulomb. A correct alternative unit is:

JAΩ

JA^-1Ω^-1

JAΩ^-1

JA^-1Ω

2 / 10

The unit of resistance is the ohm. A correct alternative unit is:

WA²

WA^-1

WA^-2

WA

3 / 10

Calculate the current at A₁ in the circuit shown.

0.21 A

0.51 A

0.79 A

1.37 A

4 / 10

The current at A₁ is 4 A and the current at A₂ is 1 A. Select the current at A₄.

1 A

2 A

3 A

4 A

5 / 10

Which of these expressions is not a correct expression for calculating Ɛ?

Expression A

Expression B

Expression C

Expression D

6 / 10

What is Ɛ measured in terms of SI base units?

m² kg s^-3 A^-1

m² kg s^-2

J s^-1 A^-1

m^-1 kg s^-2

7 / 10

An electric motor is used to raise a load. When the switch is closed, the ammeter reads 94 mA and the motor raises a 568 g load through a height of 174 cm in 25 seconds. Calculate the potential difference of the circuit assuming it is 100% efficient. g = 9.81 N kg⁻¹

9.7 V

36.8 V

103.1 V

109.7 V

8 / 10

Which graph best represents the I-V characteristic graph of a NTC thermistor?

A

B

C

D

9 / 10

Which piece of equipment can be used to measure the current in a circuit?

Ammeter

Voltmeter

Oscilloscope

Newton Meter

10 / 10

Calculate the current in a circuit when the charge is 24 C over 6 seconds.

2 A

4 A

6 A

8 A

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