Exercise: Power Amplifiers

Questions for: Power Amplifiers

What transformer turns ratio is required to match an 8- speaker load so that the effective load resistance seen at the primary is 12.8 k?
A:
20:1
B:
40:1
C:
50:1
D:
60:1
Answer: B
No answer description is available. Let's discuss.
📖
📝
💬
👁️
How many transistors must be used in a class B power amplifier to obtain the output for the full cycle of the signal?
A:
0
B:
1
C:
2
D:
3
Answer: C
No answer description is available. Let's discuss.
📖
📝
💬
👁️
Determine what maximum dissipation will be allowed for a 70-W silicon transistor (rated at 25ºC) if derating is required above 25ºC by a derating factor of 0.6 W/ºC at a case temperature of 100º.
A:
25 W
B:
30 W
C:
35 W
D:
40 W
Answer: A
No answer description is available. Let's discuss.
📖
📝
💬
👁️
The Q-point is at cutoff for class ________ operation.
A:
A
B:
B
C:
C
D:
AB
Answer: B
No answer description is available. Let's discuss.
📖
📝
💬
👁️
Which class of amplifier operates in the linear region for only a small part of the input cycle?
A:
A
B:
B
C:
C
D:
AB
Answer: C
No answer description is available. Let's discuss.
📖
📝
💬
👁️
Ad Slot (Above Pagination)
Quiz