NEET | 2016Current Electricity and Electrical InstrumentHard

Question

A npn transistor is connected in common emitter configuration in a given amplifier. A load resistance of800 Ω is connected in the collector circuit and the voltage drop across it is 0.8 V. If the current amplificationfactor is 0.96 and the input resistance of the circuit is 192 Ω, the voltage gain and the power gain of theamplifier will respectively be:

Options

A.

4, 3.84

B.

3.69, 3.84

C.

4, 4

D.

4, 3.69

Solution

Voltage gain = β. RCRB
V = 0.96 80192
V=96×8192=4
And power gain of the amplifier is
βac.Av
= 0.96 ×4
= 3.84

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