Electronics and Communication Engineering - Analog Electronics
Exercise :: Analog Electronics - Section 11
41. |
Which of the amplifier circuits using junction transistors has the best gain? |
A. |
Common emitter | B. |
Common base | C. |
Common collector | D. |
All above has the same gain |
Answer: Option A
Explanation:
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42. |
To obtain very high input and O/P impedance in a feedback amplifier, the type of feedback utilized |
A. |
voltage series | B. |
current series | C. |
voltage shunt | D. |
current shunt |
Answer: Option B
Explanation:
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43. |
The thermal resistance of a BJT is about |
A. |
100° C/W | B. |
200° C/W | C. |
20° C/W | D. |
2° C/W |
Answer: Option B
Explanation:
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44. |
Oscillator with best frequency stability is |
A. |
Crystal oscillator | B. |
Phase shift oscillator | C. |
Clapp oscillator | D. |
Hartley oscillator |
Answer: Option A
Explanation:
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45. |
The IF amplifier in a superheterodyne receiver is |
A. |
single-stage single-timed amplifier | B. |
two stage of single tuned amplifier | C. |
double tuned amplifier | D. |
class-C amplifier |
Answer: Option B
Explanation:
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