56. If the arrow of crystal diode symbol is positive w.r.t. bar, then diode is …….. biased
(a) forward
(b) reverse
(c) either forward or reverse
(d) none of the above
57. A crystal diode is used as ……..
(a) an amplifier
(b) a rectifier
(c) an oscillator
(d) a voltage regulator
58. The d.c. resistance of a crystal diode is …….. its a.c. resistance.
(a) the same as
(b) more than
(c) less than
(d) none of the above
59. An ideal crystal diode is one which behaves as a perfect …….. when forward biased.
(a) conductor
(b) insulator
(c) resistance material
(d) none of the above
60. The ratio of reverse resistance and forward resistance of a germanium crystal diode is about ……..
(a) 1 : 1
(b) 100 : 1
(c) 1000 : 1
(d) 40000 : 1
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