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GATE Electronics 2018: Section Test

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Question 1

A function is given by

. Which of the following is true?

Question 2

The RC circuit shown in the figure is

Question 3

A silicon wafer has 100 nm of oxide on it and is inserted in a furnace at a temperature above 1000ºC for further oxidation in dry oxygen. The oxidation rate

Question 4

For a Hertz dipole antenna, the half power beam width (HPBW) in the E-plane is

Question 5

In the following circuit, the switch S is closed at t = 0. The rate of change of current

is given by

Question 6

Group 1 gives two possible choices for the impedance Z in the diagram. The circuit elements in Z satisfy the condition R₂C₂ > R₁C₁. The transfer function

represents a kind of controller. Match the impedances in Group I with the types of controllers in Group II.

Group-I
Q.

Group-II
1. PID controller
2. Lead compensator
3. Lag compensator

Question 7

A message signal given by

Is amplitude modulated with a carrier of frequency

to generate.

What is the power efficiency achieved by this modulation scheme?

Question 8

Four messages band limited to W, W, 2W and 3W respectively are to be multiplexed using Time Division Multiplexing (TDM). The minimum bandwidth required for transmission of this TDM signal is

Question 9

An astable multivibrator circuit using IC 555 timer is shown below. Assume that the circuit is oscillating steadily

The voltage V_C across the capacitor varies between

Question 10

The 4-point Discrete Fourier Transform (DFT) of a discrete time sequence {1, 0, 2, 3} is

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ESE & GATE EC General

Nov 30ESE & GATE EC