Electrical Engineering
GATE EE topic:electrical-engineering PYQs
Build your understanding with focused practice from past exam papers.
Questions 571–580 of 715. Imported answers require independent review unless marked reviewed.
Question 41
Open questionEENAT2 marksNeeds review
In the circuit shown in the figure, the bipolar junction transistor (BJT) has a current gain
. The base-emitter voltage drop is a constant,
. The value of the Thevenin equivalent resistance
(in
) as shown in the figure 
is ______ (up to 2 decimal places).
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Open questionEENAT2 marksNeeds review
As shown in the figure,
is the arc from the point
to the point
on the circle
. The value of the integral
is ______ (up to 2 decimal places). 
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Open questionEENAT2 marksNeeds review
Let
. The maximum value of
over the interval
is ______ (up to 1 decimal place).Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 44
Open questionEENAT2 marksNeeds review
Let
and
, where
is the
identity matrix. The determinant of
is ______ (up to 1 decimal place).Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 45
Open questionEENAT2 marksNeeds review
The capacitance of an air-filled parallel-plate capacitor is 60 pF. When a dielectric slab whose thickness is half the distance between the plates, is placed on one of the plates covering it entirely, the capacitance becomes 86 pF. Neglecting the fringing effects, the relative permittivity of the dielectric is __________ (up to 2 decimal places).
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Open questionEENAT2 marksNeeds review
The unit step response
of a unity feedback system with open loop transfer function
is shown in the figure. The value of
is ______ (up to 2 decimal places). 
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Open questionEENAT2 marksNeeds review
A three-phase load is connected to a three-phase balanced supply as shown in the figure. If
,
and
(angles are considered positive in the anti-clockwise direction), the value of
for zero current in the neutral wire is __________
(up to 2 decimal places). 
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Open questionEENAT2 marksNeeds review
The voltage across the circuit in the figure, and the current through it, are given by the following expressions:
where
radians. If the average power delivered to the circuit is zero, then the value of
(in Ampere) is ____ (up to 2 decimal places). 
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Open questionEENAT2 marksNeeds review
A phase controlled single phase rectifier, supplied by an AC source, feeds power to an R-L-E load as shown in the figure. The rectifier output voltage has an average value given by
, where
volts and
is the firing angle. If the power delivered to the lossless battery is 1600 W,
in degree is_______ (up to 2 decimal places). 
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Open questionEENAT2 marksNeeds review
The figure shows two buck converters connected in parallel. The common input dc voltage for the converters has a value of 100 V. The converters have inductors of identical value. The load resistance is 1
. The capacitor voltage has negligible ripple. Both converters operate in the continuous conduction mode. The switching frequency is 1 kHz, and the switch control signals are as shown. The circuit operates in the steady state. Assuming that the converters share the load equally, the average value of
, the current of switch S1 (in Ampere), is ____ (up to 2 decimal places). 
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