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Ohm's law

Total questions: 51

Worksheet time: 1hrs 6mins

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 resistance measured in?
a)
Ω (Ohms)
b)
V (Volts)
c)
A (Amps)
d)
W (Watts)
4.
What is Resistance?
a)
The flow of electrons
b)
Electric potential difference
c)
A battery
d)
The ability to reduce the flow of electrons
5.
Electricity that flows in a closed path is called a
a)
path
b)
current
c)
circuit
d)
light
6.
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
7.
The mathematical relationship among Voltage, Current, and Resistance
a)
Faraday's Law
b)
Tesla's Law
c)
Edison's Law
d)
Ohm's Law
8.
Current times Resistance equals
 (I X R)
a)
Power
b)
Voltage
c)
Amperage
d)
Ohm
9.

Voltage divided by Resistance

(V / R)

a)

Current

b)

Power

c)

Ohms

d)

Watts

10.

Voltage divided by Current

(V / I)

a)

Current

b)

Power

c)

Resistance

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.
If the Voltage stays the same and Resistance is increased, Current will 
a)
Increase
b)
Decrease
c)
Stay the same
d)
X
13.

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

a)

2.1 Amps

b)

2.4 Amps

c)

1.71 Amps

d)

15 Amps

14.
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
15.
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
16.
What word means how hard it is for electrons to flow through.
a)
Current
b)
Voltage
c)
Resistance
d)
Power
17.
What word means how fast the electrons flow.
a)
Current
b)
Voltage
c)
Resistance
d)
Power
18.
The flow of electricity requires a
a)
complete path
b)
incomplete path
c)
insulated current
d)
complex circuit
19.
To complete a circuit the switch must be
a)
unattached
b)
open
c)
closed
d)
It depends
20.
What resistance is needed to cause a 50A current flow because of a 500V battery?
a)
10Ώ
b)
5Ώ
c)
2500Ώ
d)
550Ώ
21.
With the engine running the charging system produces 14.5 Volts what would the current flow be if a resistance of 6 Ohms was present
a)
2.41 Ohms
b)
2.52 Ohms
c)
2.1 Ohms
d)
0.3333 Ohms
22.

Which of the following circuit diagrams is a parallel circuit?

a)
b)
c)
d)
23.

What is the current drawn by a 5 ohm resistor when it is connected to a 1.5 V battery?

a)

7.5 amperes

b)

3.33 amperes

c)

0.3 amperes

d)

6.5 amperes

24.
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
25.
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
26.
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
27.
The plastic covering is there to:
a)
Provide a conductor for electrical energy to flow.
b)
Provide an insulator so that electrical energy will not pass outside of the wires.
c)
Provide a conductor so that electrical energy can NOT flow.
d)
Provide an insulator so that electrical energy can flow.
28.

What is not needed in order to create a working circuit?

a)

battery (power source)

b)

lightbulb

c)

current

d)

closed circuit

29.

What is the resistance of a lightbulb that experiences 9 Volts and 3 amps of current?

a)

1/3 ohms

b)

3 ohms

c)

27 ohms

d)

9 ohms

30.

If switch 1 and 2 were open, which device(s) would turn on?

a)

none

b)

A and B

c)

C, D, E, F, G

d)

all of them

31.

If switch 3 and 6 were open, which device(s) would turn on?

a)

none

b)

A, B, C

c)

A, C, C, E, F

d)

all of them

32.

If a circuit had 4 D-Cell batteries (each 1.5 V) and a lightbulb with resistance of 2 ohms, what is the current that flows through the circuit?

a)

2 A

b)

3 A

c)

6 A

d)

8 A

33.

Which of the following circuit diagrams is an open circuit?

a)
b)
c)
d)
34.

Which of the following circuit diagrams would short circuit due to lack of resistance?

a)
b)
c)
d)
35.

The top circuit represents a ______________ circuit.

a)

Series

b)

Parallel

36.

The bottom circuit represents a ______________ circuit.

a)

Series

b)

Parallel

37.

What is the current drawn by a 10 ohm resistor when it is connected to a 12 V car battery?

a)

22 amperes

b)

1.2 amperes

c)

0.83 amperes

d)

120 amperes

38.

If all of the batteries have the same voltage, which circuit will have the dimmest (least bright) bulbs?

a)

LEFT

b)

MIDDLE

c)

RIGHT

d)

if they have the same voltage they will all be the same brightness.

39.

According to Ohm's Law, current equals the voltage divided by the _________.

a)

Resistance

b)

Inductance

c)

Capacitance

d)

Power

e)

Conductance

40.

What is the Voltage, V in the circuit shown?

a)

6.5 V

b)

26 V

c)

0.15 V

41.

The circuit with higher resistance will allow less charge to flow, meaning the circuit with higher resistance has less current flowing through it.

a)

True

b)

False

42.

10) If you increase the size of the resistor and keep the voltage the same, what will happen to the current?

a)

The current will decrease

b)

The current will increase

c)

The current will stay the same

43.
What letter represents Current?
a)
A
b)
I
c)
R
d)
E
44.
What is the power of a 10V bulb with 5A through it?
a)
2W
b)
2V
c)
50W
d)
50A
45.
What is the power of a 20V bulb with 5A through it?
a)
100W
b)
100V
c)
6.3W
d)
6.3A
46.
What is the current through a 4V bulb with a power of 36W?
a)
9W
b)
9A
c)
60V
d)
60A
47.
What is resistance measured in?
a)
Ω (Ohms)
b)
V (Volts)
c)
A (Amps)
d)
W (Watts)
48.

The three bulbs are identical and the two batteries are identical. Compare the brightnesses of the bulbs.

a)

A > B > C

b)

A > C > B

c)

A > B = C

d)

A < B = C

49.

The following type of circuit has the current travelling in only one continuous pathway.

a)

series

b)

parallel

50.

This type of circuit has the current travelling through branches.

a)

series

b)

parallel

51.

When the switch closed, the battery current

a)

Decreases

b)

Stay the same

c)

Increases.

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