Question: The disadvantage of impedance matching is that it _______________?

• 1. Gives distorted output
• 2. Gives low power output
• 3. Requires a transformer
• 4. None of the above

Question: The most costly coupling is _______________ coupling?

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

Question: A class A power amplifier uses _________________?

• 1. Two transistors
• 2. Three transistors
• 3. One transistor
• 4. None of the above

Question: The output stage of a multistage amplifier is also called _________________-?

• 1. Mixer stage
• 2. Power stage
• 3. Detector stage
• 4. F stage

Question: Class_____________ power amplifier has the highest collector efficiency ?

• 1. C
• 2. A
• 3. B
• 4. AB

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