GATE EE purpose:exam-prep PYQs & Answers — Page 23

Questions 221–230 of 715. Imported answers require independent review unless marked reviewed.

A semiconductor switch needs to block voltage V of only one polarity (V > 0) during OFF state as shown in figure (i) and carry current in both directions during ON state as shown in figure (ii). Which of the following switch combination(s) will realize the same?

Diagram for Electrical Engineering question 26

Your answerSelect all correct options. You can choose more than one.

Diagram for Electrical Engineering question 26 (figure 2)

Diagram for Electrical Engineering question 26 (figure 3)

Diagram for Electrical Engineering question 26 (figure 4)

Diagram for Electrical Engineering question 26 (figure 5)

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Which of the following statement(s) is/are true?

Your answerSelect all correct options. You can choose more than one.

If an LTI system is causal, it is stable

A discrete time LTI system is causal if and only if its response to a step input

is 0 for

If a discrete time LTI system has an impulse response

of finite duration the system is stable

If the impulse response

for all

, then the LTI system is stable.

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The bus admittance (

) matrix of a 3-bus power system is given below.

Considering that there is no shunt inductor connected to any of the buses, which of the following can NOT be true?

Your answerSelect all correct options. You can choose more than one.

Line charging capacitor of finite value is present in all three lines

Line charging capacitor of finite value is present in line 2-3 only

Line charging capacitor of finite value is present in line 2-3 only and shunt capacitor of finite value is present in bus 1 only

Line charging capacitor of finite value is present in line 2-3 only and shunt capacitor of finite value is present in bus 3 only

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The value of parameters of the circuit shown in the figure are

For time

, the circuit is at steady state with the switch ‘K’ in closed condition. If the switch is opened at

, the value of the voltage across the inductor (

) at

in Volts is __________ (Round off to 1 decimal place).

Diagram for Electrical Engineering question 29

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A separately excited DC motor rated 400 V, 15 A, 1500 RPM drives a constant torque load at rated speed operating from 400 V DC supply drawing rated current. The armature resistance is 1.2 Ω. If the supply voltage drops by 10% with field current unaltered then the resultant speed of the motor in RPM is __________ (Round off to the nearest integer).

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For the signals

and

shown in the figure,

is maximum at

. Then

in seconds is __________ (Round off to the nearest integer).

Diagram for Electrical Engineering question 31

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For the circuit shown in the figure,

V, DC and

A, DC. The voltage

in Volts is __________ (Round off to 1 decimal place).

Diagram for Electrical Engineering question 32

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A 50 Hz, 275 kV line of length 400 km has the following parameters:

Resistance, R = 0.035 Ω/km; Inductance, L = 1 mH/km; Capacitance, C = 0.01 μF/km;

The line is represented by the nominal-π model. With the magnitudes of the sending end and the receiving end voltages of the line (denoted by

and

, respectively) maintained at 275 kV, the phase angle difference (

) between

and

required for maximum possible active power to be delivered to the receiving end, in degree is __________ (Round off to 2 decimal places).

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In the following differential equation, the numerically obtained value of y(t), at t = 1, is __________ (Round off to 2 decimal places).

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Three points in the x-y plane are (-1, 0.8), (0, 2.2) and (1, 2.8). The value of the slope of the best fit straight line in the least square sense is __________ (Round off to 2 decimal places).

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GATE EE purpose:exam-prep PYQs

Question 26

Question 27

Question 28

Question 29

Question 30

Question 31

Question 32

Question 33

Question 34

Question 35