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Q.

For a CE-transistor amplifier, the audio signal voltage across the collector resistance of 2kΩ is 2V. Suppose the current amplification factor of the transistor is 100. Find the input signal voltage if the base resistance is 1kΩ .

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a

0.02V

b

0.01V

c

0.03V

d

0.04V

answer is B.

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Detailed Solution

Here; v0=2V,β=100,RC (collector resistance) =2kΩ,RB=1kΩAs Av=v0v1=βRCRB,vi=v0RBRC1β=(2V)1kΩ2kΩ1100=0.01V

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For a CE-transistor amplifier, the audio signal voltage across the collector resistance of 2kΩ is 2V. Suppose the current amplification factor of the transistor is 100. Find the input signal voltage if the base resistance is 1kΩ .