Question

For a CE mode amplifier, vi is 10 mV and vo is one volt. The voltage gain of the amplifier
would be
A. 50 B. 20
C. 100 D. 10

Answer 1

C. The gain will be 100.

Explanation:

When we apply a signal at the input terminal of CE transistor, working as an amplifier, it amplifies the signal. To get the amplified output, input is multiplied with the gain. Now, we are going to calculate that gain for 10mV input and 1V output.

We know that:

Gain = output / input

Gain = 1/10m

Gain = 100

Answer 2

The voltage gain of the amplifier is 100.

Explanation:

It is given that,

Input voltage for a CE mode amplifier is 10 mV and the output voltage is 1 V. We need to find the voltage gain of the amplifier. The ratio of output voltage to the input voltage is called voltage gain of the amplifier. So,

$A_v=\dfrac{V_o}{V_i}\\\\A_v=\dfrac{1}{10\times 10^{-3}}\\\\A_v=100$

So, the voltage gain of the amplifier is 100.

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CE mode amplifier

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