Exercise: Power Amplifiers

Questions for: Power Amplifiers

The reflected impedance seen from one side of the transformer to the other side is ________.
A:
N1/N2
B:
(N1/N2)2
C:
(N1/N2)1/3
D:
N1× N2
Answer: B
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Power amplifiers primarily provide sufficient power to an output load, typically from ________ to ________.
A:
a few kW, tens of kW
B:
500 W, 1 kW
C:
100 W, 500 W
D:
a few W, tens of W
Answer: D
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________ amplifiers have the highest overall efficiency.
A:
Class A
B:
Class B or AB
C:
Class C
D:
Class D
Answer: D
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In class B power amplifiers, the output signal varies for ________ of the cycle.
A:
360º
B:
180º
C:
between 180º and 360º
D:
less than 180º
Answer: B
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In ________ power amplifiers, the output signal varies for a full 360º of the cycle.
A:
class A
B:
class B or AB
C:
class C
D:
class D
Answer: A
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