Physical Sciece: Ohm's Law
SWBAT calculate current, voltage, resistance using Ohm's law
Questions and Answers
- 1.
If the voltage is 12 V and the resistance in the wire is 3 Ω, what is the the current in the circuit?
- A.
6 A
- B.
2 A
- C.
12 A
- D.
4 A
- E.
36 A
Correct Answer
D. 4 AExplanation
According to Ohm's law, the current in a circuit is equal to the voltage divided by the resistance. In this case, the voltage is given as 12 V and the resistance is given as 3 Ω. Therefore, the current in the circuit can be calculated as 12 V / 3 Ω = 4 A.Rate this question:
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- 2.
If the resistance in the circuit is 10 Ω and the current is 3 A, what is the voltage of the battery?
- A.
3 V
- B.
10 A
- C.
30 V
- D.
3.33 V
- E.
0.3 V
Correct Answer
C. 30 VExplanation
The voltage of the battery can be calculated using Ohm's Law, which states that voltage (V) is equal to current (I) multiplied by resistance (R). In this case, the current is given as 3 A and the resistance is given as 10 Ω. Therefore, the voltage of the battery can be calculated as V = I * R = 3 A * 10 Ω = 30 V.Rate this question:
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- 3.
If you connect a 7 V battery to a wire and measure the current to be 2 A, what is the resistance of that wire?
- A.
7 V
- B.
14 A
- C.
14 Ω
- D.
3.5 Ω
- E.
2 Ω
Correct Answer
D. 3.5 ΩExplanation
The resistance of a wire can be calculated using Ohm's Law, which states that resistance (R) is equal to voltage (V) divided by current (I). In this case, the voltage is given as 7 V and the current is given as 2 A. By dividing 7 V by 2 A, we get a resistance of 3.5 Ω.Rate this question:
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- 4.
If you connect a wire with 18 Ω of resistance to a batter, and measure the current to be 10 A, what is the voltage of the battery?
- A.
18 Ω
- B.
1.8 V
- C.
240 V
- D.
190 A
- E.
180 V
Correct Answer
E. 180 VExplanation
The voltage of the battery can be calculated using Ohm's Law, which states that voltage is equal to current multiplied by resistance. In this case, the resistance is given as 18 Ω and the current is measured to be 10 A. Therefore, the voltage of the battery can be calculated as 10 A multiplied by 18 Ω, which equals 180 V.Rate this question:
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- 5.
If the voltage of the battery is 5 V and the resistance in the circuit is 2.5 Ω. What is the current?
- A.
2 A
- B.
12.5 A
- C.
2.5 A
- D.
50 V
- E.
0 V
Correct Answer
A. 2 AExplanation
The current in a circuit can be calculated using Ohm's Law, which states that the current (I) is equal to the voltage (V) divided by the resistance (R). In this case, the voltage of the battery is 5 V and the resistance is 2.5 Ω. Therefore, the current can be calculated as 5 V divided by 2.5 Ω, which equals 2 A.Rate this question:
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- 6.
What is the resistance in the circuit that is connected to a 63 V battery, and is measured to have a current of 9 A.
- A.
10 A
- B.
7 Ω
- C.
657 Ω
- D.
63 Ω
- E.
7 V
Correct Answer
B. 7 ΩExplanation
The resistance in the circuit can be calculated using Ohm's Law, which states that resistance is equal to voltage divided by current. In this case, the voltage is given as 63 V and the current is given as 9 A. Therefore, the resistance can be calculated as 63 V / 9 A = 7 Ω.Rate this question:
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- 7.
If the current equals to 14 A and the resistance is 3 Ω, what is the voltage of the battery?
- A.
4.66 V
- B.
10 A
- C.
42 V
- D.
3 V
- E.
26 Ω
Correct Answer
C. 42 VExplanation
The voltage of the battery can be calculated using Ohm's Law, which states that voltage (V) is equal to the current (I) multiplied by the resistance (R). In this case, the current is given as 14 A and the resistance is 3 Ω. Therefore, the voltage can be calculated as V = 14 A * 3 Ω = 42 V.Rate this question:
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- 8.
What would happen to the current in the circuit, if the voltage increases?
- 9.
What will happen to the current, if the resistance increases?
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Current Version
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Mar 20, 2023Quiz Edited by
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May 03, 2009Quiz Created by
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