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In a common emitter amplifier output res...

In a common emitter amplifier output resistance is 5000 ohm and input resistance is 2000 ohm. If peak value of signal voltage is 10 mV and `beta = 50`, then the peak value of output voltage is :

A

`5 xx 10^(-6)` volt

B

`2.5 xx10^(-4)` volt

C

1.25 volt

D

125 volt

Text Solution

Verified by Experts

The correct Answer is:
C
`R_0=500 Omega , R_i=2000 Omega , beta = 50`
Hence `A_v = beta xx R_0//R_i=50xx5000//2000=125`
`DeltaV_e=A_vxx DeltaV_b=125xx10mV = 125 V`
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