GATE EE 2020 Paper 1 — page 19

Complete GATE EE 2020 Paper 1 overview, original pages and practice · Timed previous-paper practice

Questions 55–57 of 65. Imported answers require review unless explicitly marked reviewed.

Paper practice 65 questionsPage 19 of 22

A resistor and a capacitor are connected in series to a 10 V dc supply through a switch. The switch is closed at

, and the capacitor voltage is found to cross 0 V at

, where

is the circuit time constant. The absolute value of percentage change required in the initial capacitor voltage if the zero crossing has to happen at

is ______ (rounded off to 2 decimal places).

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A cylindrical rotor synchronous generator with constant real power output and constant terminal voltage is supplying 100 A current to a 0.9 lagging power factor load. An ideal reactor is now connected in parallel with the load, as a result of which the total lagging reactive power requirement of the load is twice the previous value while the real power remains unchanged. The armature current is now ______ A (rounded off to 2 decimal places).

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Bus 1 with voltage magnitude

pu is sending reactive power

towards bus 2 with voltage magnitude

pu through a lossless transmission line of reactance

. Keeping the voltage at bus 2 fixed at 1 pu, magnitude of voltage at bus 1 is changed, so that the reactive power

sent from bus 1 is increased by 20%. Real power flow through the line under both the conditions is zero. The new value of the voltage magnitude,

, in pu (rounded off to 2 decimal places), at bus 1 is ______.

Diagram for Electrical Engineering question 47

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2020 · Paper 1

Question 45

Question 46

Question 47