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If the emitter resistance in a common-emitter voltage amplifier is not bypassed, it will

1. reduce both the voltage gain and the input impedance
2. reduce the voltage gain and increase the input impedance
3. increase the voltage gain and reduce the input impedance
4. increase both the voltage gain and the input impedance

Correct answer: reduce the voltage gain and increase the input impedance

Solution

When the emitter resistance is not bypassed, it introduces negative feedback, which lowers the voltage gain of the amplifier. However, this resistance also increases the input impedance because it provides a higher resistance path for the input signal.

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