6. Transformer coupling can be used in …………… amplifiers.
(a) Only power
(b) Only voltage
(c) Either power or voltage
(d) None of the above
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
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
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
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
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