Electrical Engineering
GATE EE format:nat PYQs
Build your understanding with focused practice from past exam papers.
Questions 91–100 of 256. Imported answers require independent review unless marked reviewed.
Question 33
Open questionEENAT1 markNeeds review
The voltage at the input of an AC-DC rectifier is given by
where
rad/s. The input current drawn by the rectifier is given by
The input power factor, (rounded off to two decimal places), is __________________ lag.
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Open questionEENAT1 markNeeds review
Two balanced three-phase loads, as shown in the figure, are connected to a 100
V, three-phase, 50 Hz main supply. Given
and
. The ammeter reading, in amperes, is ________. (round off to nearest integer) 
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Open questionEENAT1 markNeeds review
The frequencies of the stator and rotor currents flowing in a three-phase 8-pole induction motor are 40 Hz and 1 Hz, respectively. The motor speed, in rpm, is ________________. (round off to nearest integer)
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Open questionEENAT2 marksNeeds review
Let the probability density function of a random variable
be given as
The value of ‘a’ is ________.Log in to check the answer
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Open questionEENAT2 marksNeeds review
In the circuit shown below, the magnitude of the voltage
in volts, across the 8 kΩ resistor is ____________. (round off to nearest integer) 
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Open questionEENAT2 marksNeeds review
Two generating units rated for 250 MW and 400 MW have governor speed regulations of 6% and 6.4%, respectively, from no load to full load. Both the generating units are operating in parallel to share a load of 500 MW. Assuming free governor action, the load shared in MW, by the 250 MW generating unit is ________. (round off to nearest integer)
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Open questionEENAT2 marksNeeds review
A 20 MVA, 1.2 kV, 4-pole, 50 Hz alternator has an inertia constant of 15 MJ/MVA. If the input and output powers of the alternator are 15 MW and 10 MW, respectively, the angular acceleration in mechanical degree/s² is __________. (round off to nearest integer)
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Open questionEENAT2 marksNeeds review
Consider an ideal full-bridge single-phase DC-AC inverter with a DC bus voltage magnitude of 1000 V. The inverter output voltage
shown below, is obtained when diagonal switches of the inverter are switched with 50 % duty cycle. The inverter feeds a load with a sinusoidal current given by,
A, where
. The active power, in watts, delivered to the load is ________. (round off to nearest integer) 
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Open questionEENAT2 marksNeeds review
For the ideal AC-DC rectifier circuit shown in the figure below, the load current magnitude is
A and is ripple free. The thyristors are fired with a delay angle of 45°. The amplitude of the fundamental component of the source current, in amperes, is __________. (round off to two decimal places) 
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Open questionEENAT2 marksNeeds review
A 3-phase grid-connected voltage source converter with DC link voltage of 1000 V is switched using sinusoidal Pulse Width Modulation (PWM) technique. If the grid phase current is 10 A and the 3-phase complex power supplied by the converter is given by
VA, then the modulation index used in sinusoidal PWM is __________. (round off to two decimal places)Log in to check the answer
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