ISRO EC 2023 Quiz

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Question 1

Which of following class of amplifiers provides highest efficiency?

  • Class A

  • Class B

  • Class C

  • Class F

Question 2

Compared to linear power supplies SMPS offers

  • Higher efficiency

  • Better ripple performance

  • Give better regulation

  • None of the above

Question 3

What are the different circuit topologies used for DC/DC converter designs?

  • Buck

  • Boost

  • Flyback

  • All of the above

Question 4

What is the average probability of error with two symbols 0 and 1 with source probability 0.2, 0.8 respectively transmitted over a binary asymmetric channel as design below:

ISRO-EC-2023-Q04

  • 0.35

  • 0.38

  • 0.12

  • 0.62

Question 5

Which parameter of semiconductor diode exhibits positive temperature co-efficient?

  • Reverse leakage current

  • Reverse breakdown voltage

  • Forward voltage

  • None of the above

Question 6

If a transistor operates at the middle of the dc load line, an increase in the current gain will move the Q point

  • Off the load line

  • Nowhere

  • Up on the load line

  • down on the load line

Question 7

The relation between ID and Vgs of a MOSFET in the saturation region is

  • Exponential

  • Quadratic

  • Logarithmic

  • Hyperbolic

Question 8

Which is the identity for convolution operation?

  • 1

  • 0

  • impulse δ(n)

  • unit step u(n)

Question 9

The matrix used for calculating the controllability is

  • [B AB A2B....]

  • [B BA BA2....]

  • [B AB 2AB....]

  • [B -AB -A2B....]

Question 10

The standard form of PID controller is

  • Kp + Kds + Kis2

  • Kp + Kd/s + Ki/s2

  • Kp + Kds + Ki/s

  • Kps + Kds2 + Kis

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