Power Amplifier

The output signal varies for a full 360º of the cycle. It is ________ power amplifiers.

• class A

• class B

• class C

• All of the answer

The output signal varies for ________ of the cycle in class B power amplifiers.

• between 180º and 360º

• 180º

• less than 180º

• all of the answer

A form of class A amplifier having maximum efficiency of ________ uses a transformer to couple the output signal to the load.

• 50%

• 25%

• 78.5%

• 90%

Input stage of power amplifier is also called ___________

• Front end

• Beginning stage

• Normal stage

• All of the answer

The current drawn from a single power supply has the form of ________ rectified signal in class B operation.

• both a full-wave and a half-wave

• a full-wave

• a half-wave

• None of the answer

Which of the following is power amplifiers?

• Class A

• Class B

• Class C

• All of the answer

Power amplifier directly amplifies ___________

• Voltage of signal

• Current of the signal

• Power of the signal

• All of the answer

An amplifier that operates in the linear region at all times is _________________

• Class A amplifiers

• Class B amplifiers

• Class C amplifiers

• Class AB amplifiers

In class B amplifier, the maximum efficiency of is ____________.

• 50%

• 78.5%

• 100%

• None of the answer

_____________ coupling is generally employed in power amplifiers

• Transformer

• RC

• Direct

• Impedance