AC Fundamentals – Exercise – 2

51. A 20 kHz pulse waveform consists of pulses that are 15 μs wide. The duty cycle ________.

(a) is 1%
(b) is 30%
(c) is 100%
(d) cannot be determined

52. A pulse waveform has a high time of 8 ms and a pulse width of 32 ms. The duty cycle is ________.

(a) 25%
(b) 50%
(c) 1%
(d) 100%

53. The average value of a 12 V peak sine wave over one complete cycle is ________.

(a) 0 V
(b) 1.27 V
(c) 7.64 V
(d) 6.37 V

54. The average half-cycle value of a sine wave with a 40 V peak is ________.

(a) 25.48 V
(b) 6.37 V
(c) 14.14 V
(d) 50.96 V

55. If the rms current through a 6.8 kΩ resistor is 8 mA, the rms voltage drop across the resistor is ________.

(a) 5.44 V
(b) 54.4 V
(c) 7.07 V
(d) 8 V

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