AnswersWA-Physical Science BLab: Newton's Laws of Motion

Ohm's Law Answers

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1
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Which symbol and unit of measurement are used for electric current?

A
symbol: A; unit: I
B
symbol: C; unit: A
C
symbol: I; unit: C
D
symbol: I; unit: A
2
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If voltage in a circuit is constant, the current can be cut to half of its original value by changing the resistance to ________ its original value.

A
one-fourth
B
one-half
C
two times
D
four times
3

Kaya collects the data shown in the table.

Question illustration
A
0.05
Option A
B
1.8
Option B
C
5.7
Option C
D
20
Option D
4

A light bulb has a resistance of 360 . What is the current in the bulb when it has a potential difference of 120 V across it?

Question illustration
A
0.33 A
B
3 A
C
480 A
D
43,200 A
5

What is the resistance of a light bulb if a potential difference of 120 V will produce a current of 0.5 A in the bulb?

A
0.0042
Option A
B
0.5
Option B
C
60
Option C
D
240
Option D
6

To increase the current in a circuit, which can be increased?

A
voltage
B
resistance
C
interference
D
ohms
7

A circuit has a current of 2.4 A. The voltage is increased to 4 times its original value, while the resistance stays the same.

A
It should decrease to one-half of its value.
B
It should decrease to one-fourth of its value.
C
It should increase to two times its value.
D
It should increase to four times its value.
8

Which symbol and unit of measurement are used for resistance?

A
symbol: R; unit :
Option A
B
symbol: ; unit: R
Option B
C
symbol: R; unit: O
D
symbol: R; unit: R
9

When the resistance in a circuit remains constant, how are the voltage and current related?

A
The current doubles when the voltage doubles because they are directly proportional.
B
The current doubles when the voltage doubles because they are inversely proportional.
C
The current is cut in half when the voltage doubles because they are directly proportional.
D
The current is cut in half when the voltage doubles because they are inversely proportional.
10

Which statement describes the relationship of voltage and current?

A
Voltage is directly proportional to current because I = .
Option A
B
Voltage is inversely proportional to current because I = .
Option B
C
Voltage is directly proportional to current because I = VR.
D
Voltage is inversely proportional to current because I = VR.

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