Question

explain how the range of variation of amplitude of input signal is decided for the proper working of a transistor​

Answer 1

For a signal amplifier to operate correctly without any distortion to the output signal, it requires some form of DC Bias on its Base or Gate terminal. ... The Power, Voltage or Current Gain, (amplification) provided by the amplifier is the ratio of the peak output value to its peak input value (Output ÷ Input).