An amplifier which has zero input signal is called __________.

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RRB ALP Instrument Mechanic 23 Jan 2019 Official Paper (Shift 1)

Answer 1

When an amplifier has zero input signal, it means that there is no signal present at the input of the amplifier circuit.
This condition is commonly referred to as the "zero signal condition" because there is no input signal to amplify.
When there is no input signal, the amplifier output typically remains at a steady-state level, which may be determined by the amplifier's biasing arrangement or other factors in the circuit.
In audio amplifiers, for example, the output may rest at a certain voltage level known as the quiescent point or bias point.

Here, option 2 is correct.

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