GATE EE branch:ee PYQs & Answers — Page 42

Questions 411–420 of 715. Imported answers require independent review unless marked reviewed.

Topic practice 715 questionsPage 42 of 72

A single-phase, full-bridge diode rectifier fed from a 230 V, 50 Hz sinusoidal source supplies a series combination of finite resistance, R, and a very large inductance, L. The two most dominant frequency components in the source current are:

Your answerChoose one option.

50 Hz, 0 Hz

50 Hz, 100 Hz

50 Hz, 150 Hz

150 Hz, 250 Hz

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Thyristor

is triggered at an angle

(in degree), and

at angle

, in each cycle of the sinusoidal input voltage. Assume both thyristors to be ideal. To control the load power over the range 0 to 2 kW, the minimum range of variation in

is:

Diagram for Electrical Engineering question 12

Your answerChoose one option.

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Which of the options is an equivalent representation of the signal flow graph shown here?

Diagram for Electrical Engineering question 13

Your answerChoose one option.

Diagram for Electrical Engineering question 13 (figure 2)

Diagram for Electrical Engineering question 13 (figure 3)

Diagram for Electrical Engineering question 13 (figure 4)

Diagram for Electrical Engineering question 13 (figure 5)

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A common-source amplifier with a drain resistance,

, is powered using a 10 V power supply. Assuming that the transconductance,

, is 520

A/V, the voltage gain of the amplifier is closest to:

Your answerChoose one option.

−2.44

−1.22

1.22

2.44

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A sequence detector is designed to detect precisely 3 digital inputs, with overlap sequences detectable. For the sequence (1,0,1) and input data (1,1,0,1,0,0,1,1,0,1,0,1,1,0), what is the output of this detector?

Your answerChoose one option.

1,0,0,0,0,1,1,0,1,0,0

0,1,0,0,0,0,1,0,1,0,0

0,1,0,0,0,0,1,0,1,1,0

0,1,0,0,0,0,0,1,0,0,0

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Consider the initial value problem below. The value of y at

, (rounded off to 3 decimal places) is ____________.

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A three-phase, 50 Hz, 4-pole induction motor runs at no-load with a slip of 1 %. With full load, the slip increases to 5 %. The % speed regulation of the motor (rounded off to 2 decimal places) is ____________.

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Currents through ammeters A2 and A3 in the figure are

and

, respectively. The reading of the ammeter A1(rounded off to 3 decimal places) is ______ A.

Diagram for Electrical Engineering question 18

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The Thevenin equivalent voltage,

, in V (rounded off to 2 decimal places) of the network shown below, is ____________.

Diagram for Electrical Engineering question 19

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A double pulse measurement for an inductively loaded circuit controlled by the IGBT switch is carried out to evaluate the reverse recovery characteristics of the diode, D, represented approximate as a piecewise linear plot of current vs time at diode turn-off.

is a parasitic inductance due to the wiring of the circuit, and is in series with the diode. The point on the plot (indicate your choice by entering 1, 2, 3 or 4) at which the IGBT experiences the highest current stress is ____________.

Diagram for Electrical Engineering question 20

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GATE EE branch:ee PYQs

Question 11

Question 12

Question 13

Question 14

Question 15

Question 16

Question 17

Question 18

Question 19

Question 20