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Ohms Law

Total questions: 52

Worksheet time: 48mins

Name
Class
Date
1.
What size resistor would produce a 3 Amp current flow with a 12 Volt battery
a)
1 Ohm
b)
3 Ohms
c)
4 Ohms
d)
12 Ohms
2.
What is current measured in?
a)
Ω (Ohms)
b)
V (Volts)
c)
A (Amps)
d)
W (Watts)
3.
What is current measured in?
a)
Ω (Ohms)
b)
V (Volts)
c)
A (Amps)
d)
W (Watts)
4.
What is resistance measured in?
a)
Ω (Ohms)
b)
V (Volts)
c)
A (Amps)
d)
W (Watts)
5.
What is Resistance?
a)
The flow of electrons
b)
Electric potential difference
c)
A battery
d)
The ability to reduce the flow of electrons
6.
Electricity that flows in a closed path is called a
a)
path
b)
current
c)
circuit
d)
light
7.
What is the Voltage of a circuit that has a resistance of 5 Ω and a current of 2 A?
a)
25 V
b)
10 V
c)
2.5 V
d)
0.4 V
8.
The mathematical relationship among Voltage, Current, and Resistance
a)
Faraday's Law
b)
Tesla's Law
c)
Edison's Law
d)
Ohm's Law
9.
Current times Resistance equals
 (I X R)
a)
Power
b)
Voltage
c)
Amperage
d)
Ohm
10.

Voltage divided by Resistance

(V / R)

a)

Current

b)

Power

c)

Ohms

d)

Watts

11.
If the Voltage is increased and the resistance stays the same, Current will
a)
Increase
b)
Decrease
c)
Stay the same
d)
X
12.
How many Volts would we need to produce a current flow of 8 Amps through a 6 Ohm resistor
a)
12 volts
b)
24 volts
c)
1.3333
d)
48 volts
13.
This circuit has a 24 volt battery and the resistor is 8 ohms. How many amps are running through the circuit?
a)
3 Amps
b)
192 Amps
c)
2 Amps
d)
4 Amps
14.
What word means how hard it is for electrons to flow through.
a)
Current
b)
Voltage
c)
Resistance
d)
Power
15.
How many Volts would it take to push 1 Amp through a resistance of 1 Ohm
a)
10 volts
b)
1 volt
c)
48 volts
d)
5 volts
16.
What word means how hard it is for electrons to flow through.
a)
Current
b)
Voltage
c)
Resistance
d)
Power
17.
What would the circuit resistance be if a 7.5 Amp draw was present with the engine running and the charging system producing 15 Volts
a)
15 Ohms
b)
4 Ohms
c)
0.3333 Ohms
d)
2 Ohms
18.
What is current measured in?
a)
Ω (Ohms)
b)
V (Volts)
c)
A (Amps)
d)
W (Watts)
19.
What is resistance measured in?
a)
Ω (Ohms)
b)
V (Volts)
c)
A (Amps)
d)
W (Watts)
20.
What is Resistance?
a)
The flow of electrons
b)
Electric potential difference
c)
A battery
d)
The ability to reduce the flow of electrons
21.
How many Volts would we need to produce a current flow of 8 Amps through a 6 Ohm resistor
a)
12 volts
b)
24 volts
c)
1.3333
d)
48 volts
22.
Current times Resistance equals
 (I X R)
a)
Power
b)
Voltage
c)
Amperage
d)
Ohm
23.
If the Voltage is increased and the resistance stays the same, Current will
a)
Increase
b)
Decrease
c)
Stay the same
d)
X
24.
If the Voltage stays the same and Resistance is increased, Current will 
a)
Increase
b)
Decrease
c)
Stay the same
d)
X
25.
The mathematical relationship among Voltage, Current, and Resistance
a)
Faraday's Law
b)
Tesla's Law
c)
Edison's Law
d)
Ohm's Law
26.
Electricity that flows in a closed path is called a
a)
path
b)
current
c)
circuit
d)
light
27.
To complete a circuit the switch must be
a)
unattached
b)
open
c)
closed
d)
It depends
28.
What is the Voltage of a circuit that has a resistance of 5 Ω and a current of 2 A?
a)
25 V
b)
10 V
c)
2.5 V
d)
0.4 V
29.
This circuit has a 24 volt battery and the resistor is 8 ohms. How many amps are running through the circuit?
a)
3 Amps
b)
192 Amps
c)
2 Amps
d)
4 Amps
30.

Voltage divided by Resistance

(V / R)

a)

Current

b)

Power

c)

Ohms

d)

Watts

31.
What would the circuit resistance be if a 7.5 Amp draw was present with the engine running and the charging system producing 15 Volts
a)
15 Ohms
b)
4 Ohms
c)
0.3333 Ohms
d)
2 Ohms
32.

What is the formula for ohms law?

a)

1+2=3

b)

R X V = I

c)

V=I x R

d)

R= I x V

33.
What is the Voltage of a circuit that has a resistance of 5 Ω and a current of 2 A?
a)
25 V
b)
10 V
c)
2.5 V
d)
0.4 V
34.
How do you calculate voltage?
a)
Current X Resistance
b)
Resistance ÷ Current
c)
Current ÷ Resistance
d)
Measure it with a ruler
35.

The mathematical relationship among Voltage, Current, and Resistance

a)

Faraday's Law

b)

Tesla's Law

c)

Edison's Law

d)

Ohm's Law

36.

According to Ohm's Law, if you were to triple the voltage of a circuit without changing the resistance, what would happen to the flow of current?

a)

It would stay the same

b)

It would increase by 2x

c)

It would increase by 3x

d)

It would decrease by 3x

37.

According to Ohm's Law, if you were to double the voltage and double the resistance, what would happen to the flow of current?

a)

It would stay the same

b)

It would increase 2x

c)

It would increase 4x

d)

It would decrease 2x

38.

An alarm clock draws 0.5 A of current when connected to a 120 volt circuit. Calculate its resistance.

a)

60Ω

b)

120Ω

c)

180Ω

d)

240Ω

39.

Speakers need a household voltage of 110 V to push a current of 5.5 A through them. What is the

resistance of the speakers?

a)

10Ω

b)

20Ω

c)

30Ω

d)

40Ω

40.

An IPod uses a standard 1.5 V battery. How much resistance is in the circuit if it uses a current of 0.01A?

a)

50Ω

b)

100Ω

c)

150Ω

d)

200Ω

41.

A circuit contains a 1.5 volt battery and a bulb with a resistance of 3 ohms. Calculate the current.

a)

0.5A

b)

1A

c)

1.5A

d)

2A

42.

What current flows through a hair dryer plugged into a 120 Volt circuit if it has a resistance of 25 ohms?

a)

2.4A

b)

3.6A

c)

4.8A

d)

6A

43.

If a toaster produces 12 ohms of resistance in a 120-volt circuit, what is the amount of current in the

circuit?

a)

5A

b)

10A

c)

15A

d)

20A

44.

A 12 Volt car battery pushes charge through the headlight circuit resistance of 10 ohms. How much current

is passing through the circuit?

a)

1A

b)

1.2A

c)

1.4A

d)

1.6A

45.

How much voltage would be necessary to generate 10 amps of current in a circuit that has 5 ohms of

resistance?

a)

10V

b)

50V

c)

100V

d)

150V

46.

An electric heater works by passing a current of 100 A though a coiled metal wire, making it red hot. If the

resistance of the wire is 1.1 ohms, what voltage must be applied to it?

a)

70V

b)

90V

c)

110V

d)

130V

47.

A light bulb has a resistance of 5 ohms and a maximum current of 10 A. How much voltage can be applied

before the bulb will break?

a)

5V

b)

10V

c)

25V

d)

50V

48.

What is the potential difference across an electrical load that has a resistance of 4 Ω and a current of 3 A flowing through it?

a)

4V

b)

8V

c)

12V

d)

16V

49.

Calculate the current an electric clothes dryer draws when it is connected to a 230 V source and has a resistance

of 9.2 Ω.

a)

5A

b)

15A

c)

25A

d)

35A

50.

A portable radio connected to a 9.0 V battery draws a current of 25 A. What is the resistance of the radio?

a)

0.036Ω

b)

0.36Ω

c)

3.6Ω

d)

36Ω

51.

What type of energy is the electrical energy from the battery being converted into in this radio?

a)

Heat and light

b)

Sound and light

c)

Sound and heat

d)

Potential energy

52.

How much resistance does a heavy duty flashlight have if it has a current of 25 mA flowing through it and is being

powered by four 1.5 V cells?

a)

0.15Ω

b)

1.5Ω

c)

15Ω

d)

150Ω

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