Physics · 2019
JEE Main · 9 April 2019, Shift 1 · Q27
An NPN transistor is used in common emitter configuration as an amplifier with 1 k Ω load resistance. Signal voltage of 10 mV is applied across the…
An NPN transistor is used in common emitter configuration as an amplifier with $\displaystyle 1 \mathrm{k} \Omega$ load resistance. Signal voltage of $\displaystyle 10$ mV is applied across the base-emitter. This produces a $\displaystyle 3$ mA change in the collector current and $\displaystyle 15 \mu \mathrm{~A}$ change in the base current of the amplifier. The input resistance and voltage gain are :
Official answer
(3)
$\displaystyle 0.67 \mathrm{k} \Omega, 300$
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JEE Main 2019 Physics question, with the answer from NTA’s final answer key. Where our answers come from.