Question

The O/P Power of a power amplifier is several times its input power. It is possible because

a.

power amplifier introduces a -ve resistance

b.

there is +ve feed back in the circuit

c.

step up transformer is use in the circuit

d.

power amplifier converts a part of I/P d.c. power into a.c. power

Answer: (d).power amplifier converts a part of I/P d.c. power into a.c. power

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Q. The O/P Power of a power amplifier is several times its input power. It is possible because

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