GATE EE year:2020 PYQs & Answers — Page 7

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

Topic practice 65 questionsPage 7 of 7

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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An 8085 microprocessor accesses two memory locations (2001H) and (2002H), that contain 8-bit numbers 98H and B1H, respectively. The following program is executed:

LXI H,2001H

MVI A, 21H

INX H

ADD M

INX H

MOV M, A

HLT

At the end of this program, the memory location 2003H contains the number in decimal (base 10) form ________.

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A conducting square loop of side length 1 m is placed at a distance of 1 m from a long straight wire carrying a current

A as shown below. The mutual inductance, in nH (rounded off to 2 decimal places), between the conducting loop and the long wire is ________.

Diagram for Electrical Engineering question 55

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GATE EE year:2020 PYQs

Question 51

Question 52

Question 53

Question 54

Question 55