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Physics Question on Semiconductor electronics: materials, devices and simple circuits

For a common emitter circuit if ICIE=0.98\frac{IC}{IE}=0.98 then current gain for common emitter circuit will be

A

49

B

98

C

4.9

D

25.5

Answer

49

Explanation

Solution

The correct option is (A): 49.
ICIE=α=0.98;\frac{IC}{IE}= α=0.98;
ICIB=βαI−α=49\frac{IC}{IB}=\frac{βα}{I- α}=49