Q 12-14-123JEE MainJEE Main 2022 (27 Jul, Shift 2)Easy
For a constant collector-emitter voltage of $8$ V, the collector current of a transistor reached to the value of $6$ mA from $4$ mA, whereas base current changed from $20\ \mu$A to $25\ \mu$A value. If transistor is in active state, small signal current gain (current amplification factor) will be
Answer: (B) $400$
$$\beta = \frac{\Delta I_C}{\Delta I_B} = \frac{2\ \text{mA}}{5\ \mu\text{A}} = 400$$
Solution by Sreeraj P, M.Sc Physics