ohm's-law electronics question and answers -Page 3

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Ohm's Law problems

1. If voltage across a resistance doubles
Options
A. the current is halved
B. the resistance doubles
C. the current is unchanged
D. none of the above

Correct Answer: none of the above

2. The efficiency rating of a power supply is determined by internal power loss.
Options
A. True
B. False

Correct Answer: True

3. Heat produced by a resistor is generally a desirable effect.
Options
A. True
B. False

Correct Answer: False

4. Doubling the voltage across a resistor will cut the current by half.
Options
A. True
B. False

Correct Answer: False

5. The current through a resistor can be found by dividing the resistor's voltage by its ohmic value.
Options
A. True
B. False

Correct Answer: True

6.
If the current in the given circuit is increased to 24 mA, the source voltage must have tripled.
Options
A. True
B. False

Correct Answer: False

7. Generally, increasing the resistance in a circuit will decrease the current.
Options
A. True
B. False

Correct Answer: True

8. The voltage drop across a resistor is simply a difference of potential across that resistor.
Options
A. True
B. False

Correct Answer: True

9. Power is a measure of how fast current is flowing.
Options
A. True
B. False

Correct Answer: False

10. Current and voltage have a nonlinear relationship.
Options
A. True
B. False

Correct Answer: False

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