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Electronics and Communication Engineering - Exam Questions Papers

Exercise : Exam Questions Papers - Exam Paper 14
16.
Consider a random noise voltage which has a uniform density function as shown in the figure and is known to be white.

If the noise is the first quantized into 0.1 V steps, starting at 0 V level, and then readings made of 10 per second. The information content of the reading is :
2 bits/reading
5 bits/reading
10 bits/reading
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
17.
Consider the following statements:
The bias stability of an emitter-bias amplifier circuit improves by
  1. decreasing the value of RB
  2. increasing the value of RE
  3. decreasing the value of RB
  4. increasing the value of RB
  5. increasing the value of RC
Which of the above statements are correct?
1 and 2
2 and 3
3 and 4
4 and 5
Answer: Option
Explanation:
No answer description is available. Let's discuss.
18.
Consider the following:
  1. Si
  2. Ge
  3. GaAs
  4. InP
Which of the above semiconductors should be used for making highly efficient photodiodes?
1 and 4 only
3 and 4 only
1, 3 and 4
2, 3 and 4
Answer: Option
Explanation:
No answer description is available. Let's discuss.
19.
Which device can detect the presence of both forward and backward waves in a waveguide?
Filter
Detector
Directional coupler
Magic T
Answer: Option
Explanation:
No answer description is available. Let's discuss.
20.
The correct sequence of subsystems in an FM receiver is
Mixer, RF amplifier, Limiter, IF amplifier. Discriminator, Audio amplifier
RF amplifier, Mixer, IF amplifier, Limiter, Discriminator, Audio amplifier
RF amplifier, Mixer, Limiter, Discriminator IF amplifier, Audio amplifier
Mixer, IF amplifier, RF amplifier, Audio amplifier, Discriminator
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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