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

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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 base-emitter. This produces a 3 mA change in the collector current and $15 μ A$ change in the base current of the amplifier. The input resistance and voltage gain are:

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$0.33 k Ω, 300$

$0.67 k Ω, 300$

$0.33 k Ω, 1.5$

$0.67 k Ω, 200$

answer is B.

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