GATE EE purpose:exam-prep PYQs & Answers — Page 62

Questions 611–620 of 715. Imported answers require independent review unless marked reviewed.

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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For the circuit shown in the figure below, assume that diodes D₁, D₂ and D₃ are ideal.

Diagram for Electrical Engineering question 14

The DC components of voltages

and

, respectively are

Your answerChoose one option.

0 V and 1 V

−0.5 V and 0.5 V

1 V and 0.5 V

1 V and 1 V

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A 3-phase, 4-pole, 400 V, 50 Hz squirrel-cage induction motor is operating at a slip of 0.02. The speed of the rotor flux in mechanical rad/sec, sensed by a stationary observer, is closest to

Your answerChoose one option.

150

1470

157

154

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For the power semiconductor devices IGBT, MOSFET, Diode and Thyristor, which one of the following statements is TRUE?

Your answerChoose one option.

All the four are majority carrier devices.

All the four are minority carrier devices.

IGBT and MOSFET are majority carrier devices, whereas Diode and Thyristor are minority carrier devices.

MOSFET is majority carrier device, whereas IGBT, Diode, Thyristor are minority carrier devices.

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The figure shows the per-phase representation of a phase-shifting transformer connected between buses 1 and 2, where

is a complex number with non-zero real and imaginary parts.

Diagram for Electrical Engineering question 15

For the given circuit,

and

are bus admittance matrix and bus impedance matrix, respectively, each of size

. Which one of the following statements is true?

Your answerChoose one option.

Both

and

are symmetric

is symmetric and

is unsymmetric

is unsymmetric and

is symmetric

Both

and

are unsymmetric

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Consider

where

. Here,

represents the largest integer less than or equal to

and

denotes the smallest integer greater than or equal to

. The coefficient of the second harmonic component of the Fourier series representing

is ________.

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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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Let

, where

is the region shown in the figure and

. The value of

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

Diagram for Electrical Engineering question 17

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Assume that in a traffic junction, the cycle of the traffic signal lights is 2 minutes of green (vehicle does not stop) and 3 minutes of red (vehicle stops). Consider that the arrival time of vehicles at the junction is uniformly distributed over 5 minute cycle. The expected waiting time (in minutes) for the vehicle at the junction is _________.

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The power supplied by the 25 V source in the figure shown below is ________ W.

Diagram for Electrical Engineering question 18

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GATE EE purpose:exam-prep PYQs

Question 13

Question 14

Question 14

Question 15

Question 15

Question 16

Question 16

Question 17

Question 17

Question 18