Q3 / 88 · NTA Abhyas (JEE Main) 2020 · Physics · Semiconductors

The current gain $α$ of a transistor in common base mode is $0.995$ . Its gain $β$ in the common-emitter mode is

A
$200$
B
$99$
Correct answer
C
$199$
D
None of these

Solution

The current gain

α

of a transistor in common base mode is 0.995

β

is current gain in the common emitter mode

β = \frac{α}{1 - α} = \frac{0.995}{1 - 0.995} = 199

Hence, the correct answer is option: 'C'.

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