ohm's-law electronics question and answers -Page 4

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Ohm's Law problems

1. The value of a resistor is in direct proportion to its power handling capabilities.
Options
A. True
B. False

Correct Answer: False

2. Using 4 kWh of power is equivalent to using 2000 W of power for 2 h.
Options
A. True
B. False

Correct Answer: True

3. ___ is a better way of expressing 7,500,000 W.
Options
A. 7.5 kW
B. 7,500 MW
C. 7,500 GW
D. 7.5 MW

Correct Answer: 7.5 MW

4. The voltage across a ___ resistor is 12 V and the current through it is 500 µA.
Options
A. 600 Ω
B. 2.4 kΩ
C. 6 kΩ
D. 24 kΩ

Correct Answer: 24 kΩ

5. The ___ rating of a resistor will increase with an increase in the surface area of the resistor.
Options
A. resistance
B. current
C. power
D. voltage

Correct Answer: power

6. If the voltage across a resistor ___, the current flowing through it will increase.
Options
A. increases
B. decreases
C. stays the same
D. Not enough information

Correct Answer: increases

7.

The power rating for the resistor in the given circuit should be at least ___.
Options
A. 1/4 W
B. 1/2 W
C. 1 W
D. 2 W

Correct Answer: 1/2 W

8.

The power rating for the resistor in the given circuit should be at least ______.
Options
A. 1/4 W
B. 1/2 W
C. 1 W
D. 2 W

Correct Answer: 2 W

9. Resistance and current are _________.
Options
A. directly proportional
B. inversely proportional
C. not related
D. similar to voltage

Correct Answer: inversely proportional

10. The number of joules used in 1 second is always equal to the number of _______.
Options
A. siemens
B. coulombs
C. amperes
D. watts

Correct Answer: watts

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