Electronic Devices and Circuits - Engineering

Q1:

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

ANS:D - power amplifier converts a part of I/P d.c. power into a.c. power

No answer description is available.