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GATE 2022 Toppers Quiz 4

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Question 1

Consider the digital filter as shown in figure

Given K = 2 and input is . The output of the system is, then the value of A is ……….

Question 2

In a n-type gallium arsenide semiconductor at a temperature T = 300 k, the electron concentration varies linearly from 1016 to 1017 cm–3 over a distance of 0.5cm. If the electron diffusion coefficient is Dn = 1250 cm2/s then the electron diffusion current density will be

Question 3

Consider an infinite length lossless transmission line with characteristic impedance =50.If the line is terminated with a load =75 , then the ratio maximum input impedance to the minimum input impedance on the line is given by

Question 4

The distribution function fx(x) of a random variable X is shown in Figure. the probability that X = 1 is
Description: D:\GradeStack Courses\GATE Tests (Sent by Ravi)\GATE EC-ME-17-Mar\GATE-ECE-2004_files\image054.png

Question 5

Feedback control system is shown in figure below.

The phase margin of the system is _____

Question 6

The switch in the circuit, shown in the figure, was open for a long time and is closed at t = 0.
The current i(t) (in ampere) at t = 0.5 seconds is ________
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Question 7

A straight line is fit to a data set (ln x, y). This line intercepts the abscissa at ln x = 0.1 and has a slope of −0.02. What is the value of y at x = 5 from the fit?

Question 8

Consider P-type silicon in MOS structure. The surface potential that result in maximum space charge width is –0.412 V. Then the semiconductor doping is ____ × 1013/cm3

(Assume ni = 1.5 × 1010/cm3, T = 300°k)

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Apr 28ESE & GATE EC