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GATE 2025 Power Systems Foundation Quiz 42

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Question 1

Consider a step voltage wave of magnitude 1p.u travelling along a lossless transmission line that terminates in a reactor. The voltage magnitude across the reactor at the instant the travelling wave reaches the reactor is

Question 2

The time take by a surge to travel to the end of 1200 km long overhead transmission line is ______?

Question 3

Which of the following is the nature of surge impedance in a transmission line?

Question 4

The generalised circuit constants of a 121 kV line are –

A = D= 0.96 ∠0.5°

B = 80.0 ∠75° Ω

C = 4 × 10-3 ∠ 90° mho

What is surge impedance |Z_s| of line is?

Question 5

If a line of surge impedance Z₀ is terminated in an impedance Z then the reflection for current and voltage surges at the termination are given respectively by

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ESE & GATE EE Power Systems

Feb 13ESE & GATE EE