AnswersCrowley Credit Recovery Physics BOhm's Law

Ohm's Law Answers

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1
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Current 1 of 8.4 A runs for 240 seconds and then stops. Current 2 is 10.5 A.How long does current 2 have to run to deliver the same amount of charge as current 1?

A
88.2 s
B
192 s
C
2016 s
D
21,000 s
2
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A circuit has a current of 3.6 A and a resistance of 5.0 Ω.What is the voltage applied to the circuit?

A
0.72 V
B
1.4 V
C
8.6 V
D
18 V
3

What is the continuous flow of electric charge?

A
voltage
B
resistance
C
potential difference
D
current
4

A wire delivers 12.0 C of charge in 4.0 s.What is the current in the wire?

A
3.0 A
B
8.0 A
C
16 A
D
48 A
5

A current of 6.0 A runs through a circuit for 2.5 minutes.How much charge was delivered to this circuit?

A
15 C
B
25 C
C
600 C
D
900 C
6

What is the unit for resistance?

A
volt
B
ampere
C
ohm
D
coulomb
7

For a constant voltage, how is the resistance related to the current?

A
Resistance is inversely proportional to current, so when the resistance doubles, the current is cut in half.
B
Resistance is directly proportional to current, so when the resistance doubles, the current is cut in half.
C
Resistance is inversely proportional to current, so when the resistance doubles, the current doubles.
D
Resistance is directly proportional to current, so when the resistance doubles, the current doubles.
8

Bruce collects the data on four electric circuits listed in the table. Bruce must report any circuits that deliver more than 4.0 C of charge in 8.0 s.Which lists every circuit that Bruce must include in his report?

Question illustration
A
X and Z
B
X and Y
C
W and Y
D
W and Z
9

Jason sees a news report about a traffic jam caused by a truckload of tires that spilled across the road. The next day in class, he uses the traffic jam as an analogy to explain electric circuits to his friend.Which is most likely the analogy that Jason used?

A
The cars represent moving charges, and the spilled tires represent an increased voltage that causes the current to decrease.
B
The cars represent moving charges, and the spilled tires represent an increased resistance that causes the current to decrease.
C
The tires represent moving charges, and the cars represent an increased resistance that causes the current to decrease.
D
The tires represent moving charges, and the cars represent an increased voltage that causes the current to decrease.
10

Which changes would cause an increase in the resistance of a wire? Check all that apply.

A
increasing its temperature
B
decreasing its temperature
C
using a longer wire
D
using a shorter wire
E
using a thicker wire
F
using a thinner wire
11

What is a path through which electric charges travel?

A
electric circuit
B
resistance
C
voltage
D
electric current
12

Which statement correctly describes the formation of an electric current?

A
A resistance causes electric charges to move from lower to higher potential.
B
A voltage causes electric charges to move from lower to higher potential.
C
A resistance causes electric charges to move from higher to lower potential.
D
A voltage causes electric charges to move from higher to lower potential.
13

What is the tendency of a material to oppose the flow of charge?

A
voltage
B
resistance
C
potential difference
D
current

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