PN Junction Diode – 1 – 6

26. A PN junction is a/an :

(a) Oscillator
(b) Amplifier
(c) Insulator
(d) Rectifier

ANSWER

EXPLANATION

27. The volt-ampere relation for PN junction can be expressed as :

(a) I = IS[e^(V/n.Vt)] –1
(b) I = 1/IS[e^(V/n.Vt)] –1
(c) I = IS[e^(V/n.Vt)–1]
(d) I = IS[e^(V/n.Vt) +1]

ANSWER

EXPLANATION

28. In order to increase the recombination rate in silicon PN junction device ……… is diffused.

(a) Aluminum
(b) Silver
(c) Indium
(d) Gold

ANSWER

EXPLANATION

29. An ideal diode can be considered as an :

(a) Amplifier
(b) Bi-stable switch
(c) Oscillator
(d) Fuse

ANSWER

EXPLANATION

30. The dynamic resistance of diode is :

(a) Constant and independent of operating voltage
(b) Constant and dependent on operating voltage
(c) Not a constant and independent of operating voltage
(d) Not a constant and dependent on operating voltage

ANSWER

EXPLANATION

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