Electronic Principles – Section 4

16. Absolute Zero temperature equals

A. 0°C
B. -273°C
C. -276°C
D. 25°C
E. None of the above

Correct Answer:  B. -273°C

17. At cut off, the Q point is at

A. upper end of the load line
B. middle of the load line
C. lower end of the load line
D. infinity
E. None of the above

Correct Answer:  C. lower end of the load line

18. The south pole of a magnet is the one:

A. that would be attracted to the earths north magnetic pole
B. that has its molecules arranged in a random pattern
C. that would be attracted to the earth’s south magnetic pole
D. that would be repelled by the north pole of another magnet
E. None of the above

Correct Answer:  C. that would be attracted to the earth’s south magnetic pole

19. Which one of the following statements is true?

A. Capacitive reactance is at a minimum for dc source voltages
B. Capacitive reactance decreases as the operating frequency increases
C. There is no meaningful relationship between capacitive reactance and operating frequency
D. Capacitive reactance increases as the operating frequency increases
E. None of the above

Correct Answer:  B. Capacitive reactance decreases as the operating frequency increases

20. The peak value of a sine waveform is:

A. the amplitude at 70.7% of the maximum value
B. the amplitude at 90% of the maximum value
C. the amplitude at 1.41 times the maximum value
D. the maximum positive or negative value
E. None of the above

Correct Answer:  D. the maximum positive or negative value

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