Power Amplifiers – 1 – 2

6. Transformer coupling can be used in …………… amplifiers.

(a) Only power
(b) Only voltage
(c) Either power or voltage
(d) None of the above

ANSWER

EXPLANATION

7. The output transformer used in a power amplifier is a ……………. transformer.

(a) 1:1 ratio
(b) Step-up
(c) Step-down
(d) None of the above

ANSWER

EXPLANATION

8. Low efficiency of a power amplifier results in :

(a) Low forward bias
(b) Less battery consumption
(c) More battery consumption
(d) None of the above

ANSWER

EXPLANATION

9. The pulsating d.c. applied to power amplifier causes :

(a) Hum in the circuit
(b) Burning of transistor
(c) Excessive forward voltage
(d) None of the above

ANSWER

EXPLANATION

10. The most important consideration in power amplifier is:

(a) Biasing the circuit
(b) Collector efficiency
(c) To keep the transformer cool
(d) None of the above

ANSWER

EXPLANATION

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