GATE EE discipline:electrical-electronics-and-instrumentation PYQs & Answers — Page 69

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Questions 681–690 of 715. Imported answers require independent review unless marked reviewed.

Topic practice 715 questionsPage 69 of 72

In the circuit shown in the figure, the diode used is ideal. The input power factor is __________. (Give the answer up to two decimal places.)

Diagram for Electrical Engineering question 48

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A separately excited DC generator supplies 150 A to a 145 V DC grid. The generator is running at 800 RPM. The armature resistance of the generator is 0.1Ω. If the speed of the generator is increased to 100 RPM, the current in amperes supplied by the generator to the DC grid is ________. (Give the answer up to one decimal place.)

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For the synchronous sequential circuit shown below, the output Z is zero for the initial conditions

Diagram for Electrical Engineering question 49

The minimum number of clock cycles after which the output Z would again become zero is __________

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For a system having transfer function

, a unit step input is applied at time

. The value of the response of the system at

sec (rounded off to three decimal places) is ________.

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In the circuit shown all elements are ideal and the switch S is operated at 10 kHz and 60% duty ratio. The capacitor is large enough so that the ripple across it is negligible and at steady state acquires a voltage as shown. The peak current in amperes drawn from the 50 V DC source is _____. (Give the answer up to one decimal place.)

Diagram for Electrical Engineering question 50

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Consider a causal and stable LTI system with rational transfer function

, whose corresponding impulse response begins at

. Furthermore,

. The poles of

are

for

. The zeros of

are all at

. Let

. The value of

equals ________. (Give the answer up to three decimal places.)

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Consider an overhead transmission line with 3-phase, 50 Hz balanced system with conductors located at the vertices of an equilateral triangle of length

as shown in figure below. The resistances of the conductors are neglected. The geometric mean radius (GMR) of each conductor is 0.01 m. Neglecting the effect of ground, the magnitude of positive sequence reactance in

(rounded off to three decimal places) is _____.

Diagram for Electrical Engineering question 51

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The circuit shown in the figure uses matched transistors with a thermal voltage

mV. The base currents of the transistors are negligible. The value of the resistance R in

that is required to provide 1

A bias current for the differential amplifier block shown is

Diagram for Electrical Engineering question 52

________. (Give the answer up to one decimal place.)

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A 3-phase, 50 Hz generator supplies power of 3MW at 17.32 kV to a balanced 3-phase inductive load through an overhead line. The per phase line resistance and reactance are 0.25 Ω and 3.925Ω respectively. If the voltage at the generator terminal is 17.87 kV, the power factor of the load is _____.

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The figure below shows an uncontrolled diode bridge rectifier supplied from a 220 V, 50 Hz, 1-phase ac source. The load draws a constant current

A. The conduction angle of the diode D

in degrees (rounded off to two decimal places) is ________.

Diagram for Electrical Engineering question 53

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GATE EE discipline:electrical-electronics-and-instrumentation PYQs

Question 48

Question 49

Question 49

Question 50

Question 50

Question 51

Question 51

Question 52

Question 52

Question 53