resistance-and-power electronics question and answers -Page 7

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Resistance and Power problems

1. With Ohm's law, no change in resistance means that current and voltage will be:
Options
A. directly proportional
B. unable to produce energy
C. the same
D. inversely proportional

Correct Answer: directly proportional

2. One problem with mechanically variable resistors is noticeable in audio circuits as:
Options
A. scratchy noise
B. lack of bass response
C. variable volume
D. too much treble response

Correct Answer: scratchy noise

3. A 2% 55 kΩ resistor would have a color coding of green, green, black, red, red.
Options
A. True
B. False

Correct Answer: True

4. 4 amperes will flow through a 10 Ω resistor if 20 volts are placed across the resistor.
Options
A. True
B. False

Correct Answer: False

5. The resistive track of a rheostat or potentiometer can be classified as having either a linear or tapered resistance.
Options
A. True
B. False

Correct Answer: True

6. Carbon composition resistors are the most common and the least expensive type of fixed-value resistor.
Options
A. True
B. False

Correct Answer: True

7. The maximum potential a material can withstand without rupture is called breakdown voltage.
Options
A. True
B. False

Correct Answer: False

8. A protoboard is used to make experimental circuits.
Options
A. True
B. False

Correct Answer: True

9. A digital voltmeter can be used to measure resistance.
Options
A. True
B. False

Correct Answer: True

10. Variable resistors have problems with the wiper making contact.
Options
A. True
B. False

Correct Answer: True

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