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Worksheets

Circuits and Ohm's Law

Total questions: 35

Worksheet time: 35mins

Name
Class
Date
1.
What voltage is needed to cause a 2A current flow through a 10Ω resistor?
a)
5V
b)
0.2V
c)
20V
d)
200V
2.
What resistance is needed to cause a 50A current flow because of a 500V battery?
a)
10Ώ
b)
5Ώ
c)
2500Ώ
d)
550Ώ
3.

If the battery produced 12.6 Volts, what would be the current flow be for a 6 Ohm resistor?

a)

2.1 Amps

b)

2.4 Amps

c)

1.71 Amps

d)

15 Amps

4.

If the Voltage is increased and the resistance stays the same, Current will

a)

Increase

b)

Decrease

c)

Stay the same

d)

none of these

5.

If the Voltage stays the same and Resistance is increased, Current will

a)

Increase

b)

Decrease

c)

Stay the same

d)

none of these

6.
The mathematical relationship among Voltage, Current, and Resistance
a)
Faraday's Law
b)
Tesla's Law
c)
Edison's Law
d)
Ohm's Law
7.

Which of the following is the correct formula for Calculating Current?

a)

 I = VRI\ =\ \frac{V}{R}  

b)

 R = V x IR\ =\ V\ x\ I  

c)

 I=RVI=\frac{R}{V}  

d)

 V= I x RV=\ I\ x\ R  

8.

Which of the following is the correct formula for Calculating Current?

a)

 I = VRI\ =\ \frac{V}{R}  

b)

 R = V x IR\ =\ V\ x\ I  

c)

 I=RVI=\frac{R}{V}  

d)

 V= I x RV=\ I\ x\ R  

9.

Which of the following is Ohm's Law?

a)

Current is proportional to Voltage and inversely proportional to resistance.

b)

Current is proportional to Resistance and inversely proportional to Voltage

c)

Resistance, Current and Voltage are proportional to each other.

10.

Calculate the VOLTAGE through a load, if a resistance of 500 Ω that has a current of 1.4 A flowing through it.

a)

70 V

b)

357 V

c)

.0028 V

d)

700 V

11.

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

12.

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

13.

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

14.

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

15.

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

16.

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

17.

How to you calculate the total resistance in a series circuit?

a)

R1 + R2+ R3

b)

R1 - R2 - R3

c)

1/R1 + 1/R2 + 1/R3

d)

R1 = R2 = R3

18.

How do you calculate total resistance in a parallel circuit?

a)

R1 + R2 + R3

b)

R1 - R2 - R3

c)

1/R1 +1/R2 + 1/R3 = 1/RT

d)

R1 = R2 = R3

19.

What is the equivalent or total resistance (Re) across this circuit?

a)

3 kΩ

b)

10 kΩ

c)

13 kΩ

d)

18 kΩ

20.

How would the equivalent resistance be determined?

a)

1 / Req = (1/5) + (1/8) + (1/3) Ω

b)

120 Ω

c)

1.5189873 Ω

d)

1 / Req = (1/5) * (1/8) * (1/3) Ω

21.
The equivalent resistance in this circuit is 
a)
100 ohms
b)
450 ohms
c)
400 ohms
d)
30 ohms
22.

What is the total resistance of the circuit?

a)

100Ω

b)

200Ω

c)

.063Ω

d)

15.8Ω

23.

Find the total resistance of the circuit

a)

25Ω

b)

75Ω

c)

100Ω

d)

18.75Ω

24.

Find the total resistance of the Circuit

a)

100Ω

b)

1.09Ω

c)

.92Ω

d)

33Ω

25.

Find the total resistance of the circuit

a)

42.1

b)

2.55

c)

.39

d)

52.9

26.

What effect do electrons flowing through a resistor have on the resistor.

a)

make it glow

b)

reduce it's resistance

c)

increase it's resistance

d)

heat it up

27.

in which circuit is the lamp brightest

a)

1

b)

2

c)

3

d)

All the same

28.

As the length of a wire increases, the resistance of the wire will

a)

increase

b)

decrease

c)

stay the same

29.

As the diameter of a wire increases, the resistance of the wire will

a)

increase

b)

decrease

c)

stay the same

30.

Which resistor has the biggest voltage across it?

a)

2 Ω

b)

3 Ω

c)

4 Ω

d)

all have the same

31.
This is an example of a _______ circuit
a)
open
b)
series
c)
parallel
d)
square
32.
This is an example of a ______ circuit
a)
Series
b)
Parallel
c)
Open
d)
Dihexihedral
33.
What kind of circuit is this?
a)
Series
b)
Consecutive
c)
Parallel
d)
Training
34.
What kind of circuit is this?
a)
Series
b)
Consecutive
c)
Parallel
d)
Training
35.
The picture shows an electrical circuit. This circuit is a series circuit because: 
a)
It has 3 light bulbs.
b)
The same current flows through all three light bulbs.
c)
It uses a single battery.
d)
The electrical current is divided between the three light bulbs.

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