GATE EE concept:voltage PYQs & Answers — Page 6

Questions 51–60 of 61. Imported answers require independent review unless marked reviewed.

A phase-controlled, single-phase, full-bridge converter is supplying a highly inductive DC load. The converter is fed from a 230 V, 50 Hz, AC source. The fundamental frequency in Hz of the voltage ripple on the DC side is

Your answerChoose one option.

100

300

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A three-phase voltage source inverter with ideal devices operating in 180° conduction mode is feeding a balanced star-connected resistive load. The DC voltage input is

. The peak of the fundamental component of the phase voltage is

Your answerChoose one option.

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The figure below shows the circuit diagram of a controlled rectifier supplied from a 230 V, 50 Hz, 1-phase voltage source and a 10:1 ideal transformer. Assume that all devices are ideal. The firing angles of the thyristors

and

are 90° and 270°, respectively.

Diagram for Electrical Engineering question 16

The RMS value of the current through diode

in amperes is _________.

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A 10-bus power system consists of four generator buses indexed as G1, G2, G3, G4 and six load buses indexed as L1, L2, L3, L4, L5, L6. The generator-bus G1 is considered as slack bus, and the load buses L3 and L4 are voltage controlled buses. The generator at bus G2 cannot supply the required reactive power demand, and hence it is operating at its maximum reactive power limit. The number of non-linear equations required for solving the load flow problem using Newton-Raphson method in polar form is _____.

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In the converter circuit shown below, the switches are controlled such that the load voltage

is a 400 Hz square wave.

Diagram for Electrical Engineering question 24

The RMS value of the fundamental component of

in volts is ________.

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A 3-phase voltage source inverter is supplied from a 600 V DC source as shown in the figure below.

Diagram for Electrical Engineering question 25

For a star connected resistive load of 20 Ω per phase, the load power for 120° device conduction, in kW, is ________.

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The input voltage V_DC of the buck-boost converter shown below varies from 32 V to 72 V. Assume that all components are ideal, inductor current is continuous, and output voltage is ripple free. The range of duty ratio D of the converter for which the magnitude of the steady-state output voltage remains constant at 48 V is

Diagram for Electrical Engineering question 38

Your answerChoose one option.

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The figure below shows a half-bridge voltage source inverter supplying an RL-load with

and

. The desired fundamental frequency of the load voltage is 50 Hz. The switch control signals of the converter are generated using sinusoidal pulse width modulation with modulation index,

. At 50 Hz, the RL-load draws an active power of 1.44 kW. The value of DC source voltage

in volts is

Diagram for Electrical Engineering question 39

Your answerChoose one option.

500

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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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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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GATE EE concept:voltage PYQs

Question 11

Question 13

Question 16

Question 21

Question 24

Question 25

Question 38

Question 39

Question 50

Question 52