GATE EE 2023 Question Paper (05-Feb-2023) (Shift 1)

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?

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

The bus admittance (Y${}_{bus}$) 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?

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

R1 = 2Ω, R₂ = 2Ω, R₃ = 3Ω, L = 10 mH, C = 100 μF

For time t < 0, the circuit is at steady state with the switch ‘K’ in closed condition. If the switch is opened at t = 0, the value of the voltage across the inductor (V${}_L$) at t = 0⁺ in Volts is ____________ (Round off to 1 decimal place).

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).