Power Amplifiers – 1 – 1

1. Just as a voltage amplifier amplifies signal voltage, a power amplifier :

(a) amplifies power 
(b) amplifies signal current 
(c) merely converts the dc power into useful ac power
(d) merely converts the signal ac power into the dc power 

Answer
Answer : (c)

Explanation
No answer description available for this question. Let us discuss.

2. ………………. coupling is generally employed in power amplifiers.

(a) RC
(b) direct
(c) Impedance
(d) Transformer

Answer
Answer : (d)

Explanation
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3. Power amplifiers handle …………. signals compare to voltage amplifiers.

(a) Small
(b) Very small
(c) Large
(d) None of the above

Answer
Answer : (c)

Explanation
No answer description available for this question. Let us discuss.

4. A power amplifier has comparatively …………….. β.

(a) Small
(b) Large
(c) Very large
(d) None of the above

Answer
Answer : (a)

Explanation
No answer description available for this question. Let us discuss.

5. Power amplifiers generally use transformer coupling because transformer permits:

(a) Cooling of the circuit
(b) Distortionless output
(c) Impedance matching
(d) Good frequency response

Answer
Answer : (c)

Explanation
No answer description available for this question. Let us discuss.

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