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LMRC 2018 JE EC Exam: Tech Quiz 1

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Question 1

Which is the correct sequence in the generation of PCM?
1. Sampling
2. Converting to PAM
3. Quantization
4. Adding of supervisory signal
5. Encoding

Question 2

List-I
a. LED
b. LASER
c. Solar Cell
d. Photo diode
List-II
i. Stimulated emission
ii. Spontaneous emission
iii. Power generator iv. Detector

Question 3

In intrinsic semiconductor

Question 4

When a plane wave propagating through free space, the direction of the field
1. ‘E’ is perpendicular to the direction of propagation.
2. ‘H’ is perpendicular to the direction of propagation.
3. ‘E’ is perpendicular to the direction of the field ‘H’.

Question 5

Which logic function has the output low only when both inputs are high?
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Feb 21ESE & GATE EC