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Bipolar Junction Transistors (BJT) - Technical MCQs

Q1:

If an input signal ranges from 20–40 mu.gifA (microamps), with an output signal ranging from .5–1.5 mA (milliamps), what is the ac beta?

A 0.05

B 20

C 50

D 500

ANS:C - 50

1*10^-3/20*10^-6 = 50. From equation B=collector current gain /base current gain.