GATE EE 2020 Paper 1 — page 21

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

Questions 61–63 of 65. Imported answers require review unless explicitly marked reviewed.

Paper practice 65 questionsPage 21 of 22

A single-phase, full-bridge, fully controlled thyristor rectifier feeds a load comprising a 10 Ω resistance in series with a very large inductance. The rectifier is fed from ideal 230 V, 50 Hz sinusoidal source through cables which have negligible internal resistance and a total inductance of 2.28 mH. If the thyristors are triggered at an angle

, the commutation overlap angle in degree (rounded off to 2 decimal places) is ______.

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A non-ideal Si-based pn junction diode is tested by sweeping the bias applied across its terminals from −5 V to +5 V. The effective thermal voltage,

, for the diode is measured to be

mV. The resolution of the voltage source in the measurement range is 1 mV. The percentage uncertainty (rounded off to 2 decimal places) in the measured current at a bias voltage of 0.02 V is ______.

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The temperature of the coolant oil bath for a transformer is monitored using the circuit shown. It contains a thermistor with a temperature-dependent resistance,

, where

is the temperature in °C. The temperature coefficient,

, is

%/°C. Circuit parameters:

. The error in the output signal (in V, rounded off to 2 decimal places) at 150 °C is ________.

Diagram for Electrical Engineering question 53

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2020 · Paper 1

Question 51

Question 52

Question 53