Electronics and Communication Engineering
GATE ECE year:2021 PYQs
Build your understanding with focused practice from past exam papers.
Questions 21–30 of 65. Imported answers require independent review unless marked reviewed.
Question 11
Open questionECMCQ1 markNeeds review
If
, where
and
indicate the bases of the corresponding numbers, thenYour answerChoose one option.
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Open questionECMCQ1 markNeeds review
Addressing of a
memory is realized using a single decoder. The minimum number of AND gates required for the decoder isYour answerChoose one option.
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Open questionECMCQ1 markNeeds review
The block diagram of a feedback control system is shown in the figure. The transfer function
of the system is 
Your answerChoose one option.
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Open questionECMCQ1 markNeeds review
The complete Nyquist plot of the open-loop transfer function
of a feedback control system is shown in the figure. If
has one zero in the right-half of the
-plane, the number of poles that the closed-loop system will have in the right-half of the
-plane is 
Your answerChoose one option.
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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 15
Open questionECMCQ1 markNeeds review
Consider a rectangular coordinate system
with unit vectors
,
, and
. A plane wave traveling in the region
with electric field vector
is incident normally on the plane at
, where
is the phase constant. The region
is free space and the region
is filled with a lossless medium (permittivity
, permeability
, where
F/m and
H/m). The value of the reflection coefficient isYour answerChoose one option.
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Open questionECNAT1 markNeeds review
If the vectors
,
and
in
are linearly dependent, the value of
is __________.Log in to check the answer
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Open questionECNAT1 markNeeds review
Consider the vector field
in a rectangular coordinate system
with unit vectors
,
and
. If the field
is irrotational (conservative), then the constant
(in integer) is __________.Log in to check the answer
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Open questionECNAT1 markNeeds review
Consider the circuit shown in the figure.
The current
flowing through the
resistor between P and Q (rounded off to one decimal place) is __________ A.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 19
Open questionECNAT1 markNeeds review
Consider the circuit shown in the figure.
The value of
(rounded off to one decimal place) is __________ V.Log in to check the answer
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Open questionECNAT1 markNeeds review
An 8-bit unipolar (all analog output values are positive) digital-to-analog converter (DAC) has a full-scale voltage range from 0 V to 7.68 V. If the digital input code is 10010110 (the leftmost bit is MSB), then the analog output voltage of the DAC (rounded off to one decimal place) is __________ V.
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