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Electronics and Communication Engineering - Exam Questions Papers

Exercise : Exam Questions Papers - Exam Paper 21
46.
A magnetic field in air is measured to be

What current distribution leads to this field?
[Hint: The algebra is trivial in cylindrical coordinates.]
0
Answer: Option
Explanation:
No answer description is available. Let's discuss.
47.
For a series R-L-C circuit, the characteristic equation is given as

If is denoted by a and by β, then under the condition of β2 > a2, the system will be
critically damped
underdamped
undamped
overdamped
Answer: Option
Explanation:
No answer description is available. Let's discuss.
48.
In the epitaxial diffused method of fabricating integrating circuits the process involved are __________
  1. Epitaxial growth
  2. Diffusion
  3. Silicon diode growth
  4. Vacuum evaporation of aluminium
  5. Photoetching
The correct order is
1 - 2 - 3 - 4 - 5
1 - 3 - 5 - 2 - 4
3 - 1 - 4 - 5 - 2
1 - 3 - 2 - 4 - 5
Answer: Option
Explanation:
No answer description is available. Let's discuss.
49.
The switch in the circuit shown was on position a for a long time, and is moved to position b at time t = 0. The current i(t) for t > 0 is given by
0.2e-125tu(t) mA
20e-1250tu(t) mA
0.2e-1250tu(t) mA
20e-1000tu(t) mA
Answer: Option
Explanation:
No answer description is available. Let's discuss.
50.
For a standard 2nd order system the maximum overshoot is 10% to an unit step input. If the magnitude of the input is doubled, then maximum overshoot and percentage of maximum overshoot is:
maximum overshoot doubles and percentage of maximum overshoot is less than double
maximum overshoot doubles and percentage of maximum overshoot do not change
maximum overshoot remain same and percentage of maximum overshoot is double
maximum overshoot more than double and percentage of maximum overshoot is less than double
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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