A Best Way To Crack Gorenment Job Exams

ECE Objective Questions { Diode Circuits }

64. Ripple factor is the ratio of value to value
A. r.m.s., peak
B. peak, D.C.
C. r.m.s., D.C.
D. peak, r.m.s.

65. Higher value of ripple factor indicates
A. r.m.s. value equal to peak value
B. ideal rectification
C. poor rectification
D. none of the above

66. The forward region of a semiconductor diode characteristic curve is where diode appears as
A. high resistance
B. an ON switch
C. and OFF switch
D. a capacitor

67. The peak inverse voltage (PIV) is applied across a diode when it is
A. forward-biased
B. reversed-biased
C. on a heat sink

68. Which of the following statements is incorrect? Silicon diodes are used in rectifier circuit more abundantly chiefly because
A. they can stand higher temperature than germanium does
B. they cost much less than germanium diodes
C. their reverse current is much smaller than that of germanium diodes
D. their turn-off voltage is nearly half of germanium voltage

69. A zener diode is invariably used with
A. reverse bias
B. forward bias
C. zero bias
D. any of the above

70. A crystal diode is used as a
A. rectifier
B. amplifier
C. oscillator
D. any of the above

Page 10 of 36

« 8 9  10  1112 »