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ESE EC 2021 Technical Quiz 3

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Question 1

In a second order digital notch filter having notch frequency of 60 Hz and a 3-dB notch bandwidth of 6 Hz and sampling frequency employed is 400 Hz. The normalized angular notch frequency ω0 and the normalized angular 3-dB bandwidth Δω3dB are

Question 2

In a network with twelve circuit elements and five nodes, what is the minimum number of mesh equations?

Question 3

Doped silicon has Hall-coefficient of 3.68 × 10-4m3C-1 and then its carrier concentration value is

Question 4

Statement-1: Microwave link repeaters are typically about 50Kms apart.

Statement-2: Curvature effect of earth makes a limitation for distance between two microwave repeaters.

Question 5

A main memory can hold 3 page frames and initially all of them are vacant. Consider the following stream of page requests
2, 3, 2, 4, 6, 2, 5, 6, 1, 4, 6
If the stream uses FIFO replacement policy, the hit ratio h will be

Question 6

Consider the following statements regarding meta materials

1) They are not naturally occurring material

2) Electromagnetic Meta materials may show negative refractive index

3) Optical Meta material may show negative refractive index

4) These can be used to design planner lenses

Which of the statements are correct?

Question 7

What will be the new value of modulation index for the frequency sensitivity 5 kHz/V and  if the modulating signal is changed to one of 6 V peak to peak and frequency 8 kHz.

Question 8

A 5A, 110 V, unity power factor electro dynamic type wattmeter has a scale having 110 divisions. Its pressure coil is fed a voltage of  its current coil carries a current of

The needle of the wattmeter will move to

Question 9

Open loop transfer function of a unity feedback system is , and then the point of intersection of the Nyquist plot with the negative real axis is

Question 10

Which among the following Maxwell Equation represents Gauss law of Electricity?
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Feb 27ESE & GATE EC