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Electronics and Communication Engineering - Exam Questions Papers

Exercise : Exam Questions Papers - Exam Paper 22
11.
Step responses of a set of three second-order underdamped systems all have the same percentage overshoot. Which of the following diagrams represents the pole of the three systems?
Answer: Option
Explanation:
No answer description is available. Let's discuss.
12.

Assertion (A): An unbiased p-n junction develops a built-in potential at the junction with the n-side positive and the p-side negative.

Reason (R): The p-n junction behaves as a battery and supplies current to a resistance connected across its terminals.

Both A and R are individually true and R is the correct explanation of A
Both A and R are individually true but R is not the correct explanation of A
A is true but R is false
A is false but R is true
Answer: Option
Explanation:
No answer description is available. Let's discuss.
13.
FET oscillator circuit diagram is shown

The frequency of oscillation is(M is mutual inductance between L1 and L2)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
14.
Consider the following:
  1. Oscillator
  2. Emitter follower
  3. Cascaded amplifier
  4. Power amplifier
Where of these use feedback amplifiers?
1 and 2
1 and 3
2 and 4
3 and 4
Answer: Option
Explanation:
No answer description is available. Let's discuss.
15.
Which of the following photodetector does not provide gain?
Phototransistor
Photoconductor
Avalanche photodiode
p-i-n photodiode
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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