Electronics and Communication Engineering
GATE ECE kind:question PYQs
Build your understanding with focused practice from past exam papers.
Questions 161–170 of 715. Imported answers require independent review unless marked reviewed.
Question 31
Open questionECNAT1 markNeeds review
In the given circuit, the current
(in mA) is ______. 
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Open questionECNAT1 markNeeds review
In the circuit given below, the switch S was kept open for a sufficiently long time and is closed at time
. The time constant (in seconds) of the circuit for
is ______. 
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Open questionECNAT1 markNeeds review
Suppose X and Y are independent and identically distributed random variables that are distributed uniformly in the interval [0,1]. The probability that X ≥ Y is ______ .
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A source transmits symbols from an alphabet of size 16. The value of maximum achievable entropy (in bits) is ______.
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As shown in the circuit given below, the initial voltage across the capacitor is 10 V, with the switch being open. The switch is then closed at
. The total energy dissipated in the ideal Zener diode (
V) after the switch is closed (in mJ, rounded off to three decimal places) is ________.

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Open questionECMCQ2 marksNeeds review
Consider the Earth to be a perfect sphere of radius R. Then the surface area of the region, enclosed by the 60°N latitude circle, that contains the north pole in its interior is ______.
Your answerChoose one option.
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Open questionECMCQ2 marksNeeds review
Consider a unity negative feedback control system with forward path gain
as shown.

The impulse response of the closed-loop system decays faster than
if ______.Your answerChoose one option.
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Open questionECMCQ2 marksNeeds review
A satellite attitude control system, as shown below, has a plant with transfer function
cascaded with a compensator
, where
and
are positive real constants. 
In order for the closed-loop system to have poles at
, the value of
must be ______.Your answerChoose one option.
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Open questionECMCQ2 marksNeeds review
A uniform plane wave with electric field
V/m is traveling in the air (relative permittivity,
and relative permeability,
) in the
direction (
is a positive constant,
is the unit vector along the
axis). It is incident normally on an ideal electric conductor (conductivity,
) at
. The position of the first null of the total magnetic field in the air (measured from
, in metres) is ______.Your answerChoose one option.
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Open questionECMCQ2 marksNeeds review
A 4-bit priority encoder has inputs
, and
in descending order of priority. The two-bit output
is generated as 00, 01, 10, and 11 corresponding to inputs
, and
, respectively. The Boolean expression of the output bit
is ______.Your answerChoose one option.
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