Transistors – 1 – 8

36. In a transistor, if IC = 100mA and IE = 100mA then the value of β is given by :

(a) 200
(b) 100
(c) 10
(d) 1

ANSWER

EXPLANATION

37. Strictly speaking, for an NPN transistor :

(a) IC should be positive but IE should be negative
(b) IC should be negative but IE should be positive
(c) Both IC & IE should be positive
(d) Both IC & IE should be negative

ANSWER

EXPLANATION

38. When a transistor is used as amplifier, then ………… breakdown is more destructive to the device.

(a) Zener
(b) Diode
(c) Collector-Base
(d) Base-Emitter

ANSWER

EXPLANATION

39. The variation of IC with VCE observed in a bipolar transistor output characteristic is called as :

(a) Ohmic effect
(b) Early effect
(c) Late effect
(d) Natural effect

ANSWER

EXPLANATION

40. Kirk effect in a transistor occurs when :

(a) The majority carrier’s concentration in the collector becomes comparable to the donoratom doping density
(b) The minority carrier’s concentration in the collector becomes comparable to the acceptor atom doping density
(c) Emitter-base junction is reverse biased
(d) The base region of transistor stretches into the collector region of transistor

ANSWER

EXPLANATION

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