Instrumentation Engineering
GATE IN concept:amplitude PYQs
Build your understanding with focused practice from past exam papers.
How to practice concept:amplitude
Attempt a question, record the concept and assumptions, then check the available answer. Rework mistakes after revising the relevant concepts. Topic tags can overlap; review the question context.
Questions 1–5 of 5. Imported answers require independent review unless marked reviewed.
Question 52
Open questionINMCQ2 marksNeeds review
An amplitude modulated voltage signal
drives a load of 1
.
. If the efficiency is 60% and the carrier power is 30 W, the value of L is _____ V.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 16
Open questionINMCQ1 markNeeds review
A sinusoidal carrier wave with amplitude
and frequency
is amplitude modulated with a message signal
having frequency
to generate the modulated wave
given by
The message signal that can be retrieved completely using envelope detection 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 21
Open questionINNAT1 markNeeds review
An amplitude modulation (AM) scheme uses tone modulation, with modulation index of 0.6. The power efficiency of the AM scheme is ____ % (rounded off to one decimal place).
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An amplitude modulated signal is shown in the figure. The modulation index is (up to one decimal place) ______.
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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 54
Open questionINNAT2 marksNeeds review
In a sinusoidal amplitude modulation scheme (with carrier) the modulated signal is given by
, where
is the carrier frequency and
is the modulation frequency. The power carried by the sidebands in % of total power is ________%.Log in to check the answer
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