Electronics and Communication Engineering
2019 · Paper 1
Take it one question at a time. Try an answer, then check your understanding.
Complete GATE ECE 2019 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 31–33 of 65. Imported answers require review unless explicitly marked reviewed.
Question 21
Open questionECNAT1 markNeeds review
Consider the signal
, where
is in seconds. Its fundamental time period, in seconds, is _____.Log in to check the answer
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Open questionECNAT1 markNeeds review
The baseband signal
shown in the figure is phase-modulated to generate the PM signal
. The time
on the x-axis in the figure is in milliseconds. If the carrier frequency is
kHz and
, then the ratio of the minimum instantaneous frequency (in kHz) to the maximum instantaneous frequency (in kHz) is _____ (rounded off to 2 decimal places). 
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Radiation resistance of a small dipole current element of length
at a frequency of 3 GHz is 3 ohms. If the length is changed by 1%, then the percentage change in the radiation resistance, rounded off to two decimal places, is _____ %.Log in to check the answer
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