The ratio output rms power in watts to the input dc power in watts in the different amplifier class is called .

Related MCQs

• An amplifier without feedback has a voltage gain of 50, input resistance is 1 KΩ & Output resistance of 2.5KΩ.The input resistance of the current-shunt negative feedback amplifier using the above amplifier with a feedback factor of 0.2 is
• amplifiers primarily provide sufficient power to an output load to drive a speaker from a few watts to tens of watts.
• A class C amplifier has a tank circuit in the output. The amplifier is conducting only 28°. The output voltage is
• The output power of a transistor amplifier is more than the input power due to additional power supplied by
• An emitter-follower amplifier has an input impedance of 107 kΩ. The input signal is 12 mV. The approximate output voltage is (common-collector)
• The complementary Darlington-connected transistor for a class B amplifier provides output current and output resistance.
• By how much does the output signal vary for a class AB power amplifier?
• How many transistors must be used in a class B power amplifier to obtain the output for the full cycle of the signal?
• You have an application for a power amplifier to operate on FM radio frequencies. The most likely choice would be a             amplifier.
• A class A amplifier dissipates power when the load is drawing maximum power from the circuit.