Electrical Engineering
GATE EE format:nat PYQs
Build your understanding with focused practice from past exam papers.
Questions 131–140 of 256. Imported answers require independent review unless marked reviewed.
Question 50
Open questionEENAT2 marksNeeds review
An air-core radio-frequency transformer as shown has a primary winding and a secondary winding. The mutual inductance
between the windings of the transformer is _____ μH. (Round off to 2 decimal places.) 
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Open questionEENAT2 marksNeeds review
A 100 Hz square wave, switching between 0 V and 5 V, is applied to a CR high-pass filter circuit as shown. The output voltage waveform across the resistor is 6.2 V peak-to-peak. If the resistance R is 820 Ω, then the value C is _____ μF. (Round off to 2 decimal places.)
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Open questionEENAT2 marksNeeds review
A CMOS Schmitt-trigger inverter has a low output level of 0 V and a high output level of 5 V. It has input thresholds of 1.6 V and 2.4 V. The input capacitance and output resistance of the Schmitt-trigger are negligible. The frequency of the oscillator shown is ________ Hz.
(Round off to 2 decimal places.)
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Open questionEENAT2 marksNeeds review
Consider the boost converter shown. Switch Q is operating at 25 kHz with a duty cycle of 0.6. Assume the diode and switch to be ideal. Under steady-state condition, the average resistance
as seen by the source is ________
.
(Round off to 2 decimal places.) 
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Open questionEENAT2 marksNeeds review
Consider the buck-boost converter shown. Switch Q is operating at 25 kHz and 0.75 duty-cycle. Assume diode and switch to be ideal. Under steady-state condition, the average current flowing through the inductor is ________ A.
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Open questionEENAT2 marksNeeds review
A single-phase full-bridge inverter fed by a 325 V DC produces a symmetric quasi-square waveform across ‘ab’ as shown. To achieve a modulation index of 0.8, the angle
expressed in degrees should be ________.
(Round off to 2 decimal places.)
(Modulation index is defined as the ratio of the peak of the fundamental component of
to the applied DC value.) 
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 16
Open questionEENAT1 markNeeds review
Consider the initial value problem below. The value of y at
, (rounded off to 3 decimal places) is ____________.
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A three-phase, 50 Hz, 4-pole induction motor runs at no-load with a slip of 1 %. With full load, the slip increases to 5 %. The % speed regulation of the motor (rounded off to 2 decimal places) is ____________.
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Open questionEENAT1 markNeeds review
Currents through ammeters A2 and A3 in the figure are
and
, respectively. The reading of the ammeter A1(rounded off to 3 decimal places) is ______ A. 
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Open questionEENAT1 markNeeds review
The Thevenin equivalent voltage,
, in V (rounded off to 2 decimal places) of the network shown below, is ____________. 
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