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ECIL GET 2017 Recruitment: Electronics Section Quiz 20

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Question 1

A receiver tunes signals from 550 kHz to 1600 kHz with an IF of 455 kHz. The frequency tuning range ratio for the oscillator section of the receiver is nearly.

Question 2

Statement (I): FM spectrum consists of a carrier and an infinite number of side band components.
Statement (II): FM signals are used only in TV transmission to ensure better picture quality.

Question 3

The correct formula for calculating Signal-to-noise and distortion ratio is:

Question 4

Consider the following statements:
For a type-1 and a unity feedback system, having unity gain in the forward path
1) positional error constant K_p is equal to zero
2) acceleration error constant K_a is equal to zero
3) steady state error e_ss per unit-step displacement input is finite
Which of the above statements are correct?

Question 5

A 12-bit A/D converter has a full-scale analog input of 5 V. Its resolution is :

Question 6

The simplified form of the Boolean expression AB + A(B + C) + B(B + C) is given by

Question 7

If the load impedance of 75Ω in 10 m long transmission line is fed by 75 Ω input resistance of generator which gets terminated with resistance R_a as 75 Ω. Find the number of oscillation antinodes available on the transmission line, when generator gives oscillation with frequency 30 GHz.

Question 8

The Hall-coefficient of a specimen of doped semiconductor is 3.06×10^-4m³C^-1and the resistivity of the specimen is 6.93 ×10^-3Ωm. The majority carrier mobility will be:

Question 9

Statement (i): Power factor is a measure of the power in the insulator and shuld be low
Statement (ii): It varies with the temperature and usually increases with the rise in temperature of the insulation.

Question 10

The output of a linear system for step input is,

Then the transfer function is

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ESE & GATE EC General

Feb 9ESE & GATE EC