An NPN transistor is used in common emitter configuration as an amplifier with $$1k$$Ω load resistance. Signal voltage of $$10$$ mV is applied across the $$base-emitter$$. This produces a $$3$$ mA change in the collector current and $$15$$μA change in the base current of the amplifier. The input resistance and voltage gain are:

Question

An NPN transistor is  used in common emitter configuration as an amplifier with $$1k$$Ω      load  resistance. Signal voltage of $$10$$ mV is applied across the $$base-emitter$$. This  produces a $$3$$ mA change in the collector current and $$15$$μA      change in the  base current of the amplifier. The input resistance and voltage gain are:

Infinity Learn · Accepted Answer

$$ICIB=200$$ , $$IBRi=V$$ , $$Ri=23k$$ $$ohm=0.67k$$ ohm  Voltage gain $$=$$ ICIB×$$RCRI=200$$×$$100023$$×$$1000=300$$

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