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

Select a use for this circuit when the temperature fluctuates. Assume V_out is the location of external circuitry

A fan to switch on in warm temperatures.

Street lights to switch on in darkness.

Operate a heater in a reptile house.

A speaker that operates upon sunrise.

2 / 10

Select effect on V_out when the light intensity increases on this circuit.

V_out increases.

V_out decreases.

V_out remains constant.

3 / 10

Select the effect on V_out when the surrounding temperature increases for circuit.

V_out increases.

V_out decreases.

V_out remains constant.

4 / 10

Calculate the current at A₂ in the circuit shown.

0.15 A

0.21 A

0.36 A

0.51 A

5 / 10

The electromotive force, or e.m.f. (Ɛ), is measured in which unit?

Joules

Volts

Newtons

Coulombs

6 / 10

Which of these expressions is not a correct expression for calculating the electrical power of a circuit?

Expression A

Expression B

Expression C

Expression D

7 / 10

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

A

B

C

D

8 / 10

Calculate the charge moved in a circuit that has a 12 V power supply and moves 1.4x10⁶ J of energy.

8.57x10^-6 C

1.68x10^-5 C

1.17x10⁵ C

1.68x10⁷ C

9 / 10

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

Ammeter

Voltmeter

Luxmeter

Newton Meter

10 / 10

Potential difference is...

The current per second of a closed circuit.

The work done per unit charge moved.

The amount of charge passing a point in a closed circuit per second.

The difference in unit charge either side of a battery.

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