Free Printable Ohm's Law test

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Ohm's Law test

Total questions: 36

Worksheet time: 59mins

Name

Class

Date

1. What law shows the mathematical relationship between voltage, current, and resistance of an electrical circuit?

A. Watt’s law

B. Ohm's Law

C. Kirchoff's Law

D. Henry's Law

1. A circuit that contains 100 Ω of resistance has a current of 2 A. What is the applied voltage?

1. A circuit that contains 10,000 Ω of resistance has a current of 100 mA. What is the applied voltage?

A circuit has an applied voltage of 200 V that causes 50 mA current to flow. What is the circuit resistance

40 Ohms

4000 Ohms

400 Ohms

4Ohms

1. An applied voltage of 50 V causes a current of 2 A to flow. What is the circuit resistance?

75 Ohm's

50 Ohm's

80 Ohm's

25 Ohm's

1. A voltage of 500 V is applied to a circuit that contains 100 Ω of resistance. What is the current?

50 Amps

5 Amps

55 Amps

15 Amps

1. If the applied voltage is 400 V and resistance is 20,000 Ω, what is the value of I?

2 Amps

0.02 Amps

0.2 Amps

20 Amps

1. A meter indicates a current flow in a circuit of 0.5 A. The circuit resistance is 500 Ω. What is the value of E?

25 Volts

75 Volts

2.5 Volts

250 Volts

1. What applied voltage will cause 500 mA of current to flow through 500 Ω of resistance?

75 Volts

250 Volts

25 Volts

250,000 Volts

10.

1. What applied voltage will cause 10 mA of current to flow through 1000 Ω of resistance?

10,000 Volts

1000 Volts

10 Volts

100 Volts

11.

1. An electric appliance has a resistance of 22 Ω. How much current will it draw when connected to a 110 V line?

5 Amps

2420 Amps

127 Amps

242 Amps

12.

Ohm's Law states that:

Current = Voltage x Resistance

Resistance = Voltage x Current

Power = Voltage x Current

Voltage = Current x Resistance

13.

A device has a resistance of 12Ω and requires 0.5A of current. What voltage is needed to operate the device?

24V

2.4V

0.04V

14.

If a circuit contains a light bulb with a resistance of 30Ω and a 6V battery is used, what will the current be?

180A

1.8A

0.2A

15.

A toy has a 3V battery that produces a 0.2A of current. What is the toy's resistance?

0.6Ω

15Ω

0.07Ω

6Ω

16.

Imagine you are testing an electrical toy. It gets plugged into a home outlet, which has an electrical potential difference of 120V. The wires are small and you do not want the current to go above 1.5A. How high must the toy's resistance be?

180Ω

60Ω

0.0125Ω

80Ω

17.

Which of the following is NOT a correct form of Ohm's Law?

V = IR

I = R/V

R = V/I

I = V/R

18.

When connected to a circuit, a voltmeter measures 6V of voltage while an ammeter measures 300mA of current. What is the resistance in the circuit?

0.02Ω

1.8Ω

2Ω

20Ω

19.

If we connect a 4.5V battery to a circuit with a resistance of 30Ω, how much current would an ammeter measure in the circuit?

150mA

15mA

1.5A

15A

20.

A motor has an internal resistance of 40 Ohms. The motor is in a circuit with a current of 4.0 A. What is the voltage?

(a)

21.

A current of 625 mA runs through a bulb that is connected to 120 V. What is the resistance of the bulb?

(a)

22.

A 30 Volt battery creates a current through a 15 Ohm resistor. How much current is created?

(a)

23.

Calculate the voltage if the current is 7.1 A and the resistance is 4.5 Ohms.

(a)

24.

Calculate the voltage if the current is 0.11 A and the resistance is 4 Ohms. (2 decimal palces)

(a)

25.

Calculate the resistance if the voltage is 3.5 V and the current is 0.5 A.

(a)

26.

Calculate the resistance if the voltage is 10 V and the current is 3 A. (2 decimal places)

(a)

27.

Calculate the current if the voltage is 3.5 V and the resistance is 10 Ohms. (2 decimal places)

(a)

28.

Calculate the current if voltage is 10 V and resistance is 5 Ohms.

(a)

29.

What voltage produces a current of 100 amps with a resistance of 50 ohms? $V\ =\ I\times R$

(a)

30.

A 12 V battery produces a current of 6 amps. What is the resistance?

$R=\frac{V}{I}$

(a)

31.

Silver has a resistance of 0.0198 ohms. What voltage would produce a current of 250 amps?

$V=I\times R$

(a)

32.

What is the current produced by a potential difference of 120 volts through a resistance of 0.8 ohms?

$I=\frac{V}{R}$

(a)

33.

What resistance would produce a current of 120 amps from a 6V battery?

(a)

34.

A current of 310 amps is flowing through a copper wire with a resistance of 30 ohms. What is the voltage?

(a)

35.

A 9 V battery produces a current of 18 amps. What is the resistance?

(a)

36.

What resistance would produce a current of 350 amps with a potential difference of 2500 volts?

(a)

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Ohm's Law test

Total questions: 36

Worksheet time: 59mins

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