# Computer Science - Electronic Principles

### Exercise :: Electronic Principles - Section 5

31.

Which one of the following principles best describes the basic operation of a generator?

 A. Like magnetic poles repel; unlike poles attract B. Current is induced in a conductor that is moving through a magnetic field C. Like magnetic poles attract; unlike poles repel D. Current flowing through a conductor generates a magnetic field E. None of the above

Explanation:

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32.

The current gain of a transistor is defined as the ratio of the collector current to the

 A. base current B. emitter current C. supply current D. collector current E. None of the above

Explanation:

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33.

What is the total resistance of a parallel circuit that contains two resistors having values of 220 ohm and 470 ohm?

 A. 220 ohm B. 150 ohm C. 445 ohm D. 690 ohm E. None of the above

Explanation:

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34.

The equivalent of 1 kV is:

 A. 1.00 V B. 1000 V C. 100 mV D. 1000 mV E. None of the above

Explanation:

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35.

The period of a waveform is:

 A. the time required to complete one full cycle B. the number of cycles completed in one second C. the time required for the voltage to rise from 10% to 90% of the peak amplitude D. equal to 0.707 times the peak amplitude E. None of the above