Question: The maximum efficiency of resistance loaded class A power amplifier is _________________?

• 1. 5%
• 2. 50%
• 3. 30%
• 4. 25%

Question: ________________ coupling is generally employed in power amplifiers?

• 1. Transformer
• 2. RC
• 3. direct
• 4. Impedance

Question: Power amplifiers handle ______________ signals compare to voltage amplifiers?

• 1. Small
• 2. Very small
• 3. Large
• 4. None of the above

Question: The maximum efficiency of transformer coupled class A power amplifier is _______________?

• 1. 30%
• 2. 50%
• 3. 80%
• 4. 45%

Question: In class A operation, the operating point is generally located_____________of the d.c. load line?

• 1. At cut off point
• 2. At the middle
• 3. At saturation point
• 4. None of the above

Question: The maximum collector efficiency of class B operation is ________________?

• 1. 50%
• 2. 90%
• 3. 5%
• 4. 5%

Question: If a transistor is operated in such a way that output current flows for 60o of the input signal, then it is ______________ operation?

• 1. Class A
• 2. Class B
• 3. Class C
• 4. None of the above

Question: A class A power amplifier is sometimes called______________amplifier?

• 1. Symmetrical
• 2. Single-ended
• 3. Reciprocating
• 4. Differential

Question: A 2-transistor class B power amplifier is commonly called ______________ amplifier?

• 1. Dual
• 2. Push-pull
• 3. Symmetrical
• 4. Differential

Question: A power amplifier has comparatively __________________ ß ?

• 1. Small
• 2. Large
• 3. Very large
• 4. None of the above