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Q.

In a common emitter configuration with suitable bias, it is given than RL is the load resistance and RBE is small signal dynamic resistance (input side). Then, voltage gain, current gain and power gain are given respectively. (β is current gain, IB,Ic,IE are respectively base, collector and emitter currents:)

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a

βRLRBE,ΔIEΔIB,β2RLRBE

b

−β2RLRBE,ΔICΔIB,β2RLRBE

c

β2RLRBE,ΔICΔIE,β2RLRBE

d

− βRLRBE,ΔICΔIB,β2RLRBE

answer is D.

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Detailed Solution

Current gain β=ΔICΔIB Voltage gain V0Vi=-βR2R1 Power gain Ap=( current gain)2×Resistance=β2×RLRBE

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In a common emitter configuration with suitable bias, it is given than RL is the load resistance and RBE is small signal dynamic resistance (input side). Then, voltage gain, current gain and power gain are given respectively. (β is current gain, IB,Ic,IE are respectively base, collector and emitter currents:)