Transistor Audio Power Amplifiers MCQs

Option A: 1:1 ratio

Option B: Step-up

Option C: Step-down

Option D: None of the above

Correct Answer: Step-down ✔

Option A: Burning of transistor

Option B: Hum in the circuit

Option C: Excessive forward voltage

Option D: None of the above

Correct Answer: Hum in the circuit ✔

Option A: Amplitude

Option B: Intermodulation

Option C: Frequency

Option D: None of the above

Correct Answer: Frequency ✔

Option A: 1V

Option B: 100V

Option C: 20V

Option D: 10V

Correct Answer: 10V ✔

Option A: 20%

Option B: 80%

Option C: 40%

Option D: 50%

Correct Answer: 40% ✔

Option A: Class A power amplifier

Option B: Push-pull amplifier

Option C: Class C amplifier

Option D: None of the above

Correct Answer: Class A power amplifier ✔

Option A: 1 W

Option B: 2 W

Option C: 4 W

Option D: None of the above

Correct Answer: 1 W ✔

Option A: Class A

Option B: Class C

Option C: Class B

Option D: Class AB

Correct Answer: Class B ✔

Option A: 2

Option B: 7

Option C: 3

Option D: None of the above

Correct Answer: 7 ✔

Option A: 10 W

Option B: 4 W

Option C: 8 W

Option D: None of the above

Correct Answer: 4 W ✔

Option A: 10 W

Option B: 15 W

Option C: 5 W

Option D: 20 W

Correct Answer: 20 W ✔

Option A: 20 W

Option B: 40 W

Option C: 10 W

Option D: 80 W

Correct Answer: 20 W ✔

Option A: Cooling of the circuit

Option B: Impedance matching

Option C: Distortionless output

Option D: Good frequency response

Correct Answer: Impedance matching ✔

Option A: Biasing the circuit

Option B: Collector efficiency

Option C: To keep the transformer cool

Option D: None of the above

Correct Answer: Collector efficiency ✔

Option A: 5 kO

Option B: 20 kO

Option C: 100 kO

Option D: 10 kO

Correct Answer: 10 kO ✔

Option A: Either power or voltage

Option B: Only power

Option C: Only voltage

Option D: None of the above

Correct Answer: Either power or voltage ✔

Option A: Keep the amplifier cool

Option B: Protect from rusting

Option C: Prevent induction due to stray magnetic fields

Option D: None of the above

Correct Answer: Prevent induction due to stray magnetic fields ✔

Option A: Gives distorted output

Option B: Gives low power output

Option C: Requires a transformer

Option D: None of the above

Correct Answer: Gives distorted output ✔

Option A: RC

Option B: Direct

Option C: Impedance

Option D: Transformer

Correct Answer: Transformer ✔

Option A: AF amplifiers

Option B: Detectors

Option C: amplifiers

Option D: None of the above

Correct Answer: amplifiers ✔

Option A: Two transistors

Option B: Three transistors

Option C: One transistor

Option D: None of the above

Correct Answer: One transistor ✔

Option A: Mixer stage

Option B: Power stage

Option C: Detector stage

Option D: F stage

Correct Answer: Power stage ✔

Option A: C

Option B: A

Option C: B

Option D: AB

Correct Answer: C ✔

Option A: 5%

Option B: 50%

Option C: 30%

Option D: 25%

Correct Answer: 5% ✔

Option A: Transformer

Option B: RC

Option C: direct

Option D: Impedance

Correct Answer: Transformer ✔

Option A: Small

Option B: Very small

Option C: Large

Option D: None of the above

Correct Answer: Large ✔

Option A: 30%

Option B: 50%

Option C: 80%

Option D: 45%

Correct Answer: 50% ✔

Option A: At cut off point

Option B: At the middle

Option C: At saturation point

Option D: None of the above

Correct Answer: At the middle ✔

Option A: 50%

Option B: 90%

Option C: 5%

Option D: 5%

Correct Answer: 5% ✔

Option A: Class A

Option B: Class B

Option C: Class C

Option D: None of the above

Correct Answer: Class C ✔

Option A: Symmetrical

Option B: Single-ended

Option C: Reciprocating

Option D: Differential

Correct Answer: Single-ended ✔

Option A: Dual

Option B: Push-pull

Option C: Symmetrical

Option D: Differential

Correct Answer: Push-pull ✔

Option A: Small

Option B: Large

Option C: Very large

Option D: None of the above

Correct Answer: Small ✔

Option A: Low forward bias

Option B: Less battery consumption

Option C: More battery consumption

Option D: None of the above

Correct Answer: More battery consumption ✔

Option A: Maximum voltage appears across transistor

Option B: Maximum current flows

Option C: Maximum voltage appears across load

Option D: None of the above

Correct Answer: Maximum voltage appears across transistor ✔

Option A: 5 W

Option B: 33 W

Option C: 75 W

Option D: 1 W

Correct Answer: 1 W ✔

Option A: Push-pull amplifier

Option B: Preamplifier

Option C: Class A power amplifier

Option D: None of the above

Correct Answer: Push-pull amplifier ✔

Option A: Provide easy handling

Option B: Dissipate heat

Option C: Facilitate connections

Option D: None of the above

Correct Answer: Dissipate heat ✔

Option A: A

Option B: B

Option C: C

Option D: AB

Correct Answer: C ✔

Option A: Push-pull amplifier

Option B: Preamplifier

Option C: Class A power amplifier

Option D: None of the above

Correct Answer: Push-pull amplifier ✔