Instrumentation Engineering
2021 · Paper 1
Take it one question at a time. Try an answer, then check your understanding.
Complete GATE IN 2021 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 13–15 of 65. Imported answers require review unless explicitly marked reviewed.
Question 3
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An infinitely long line, with uniform positive charge density, lies along the z-axis. In cylindrical coordinates
, at any point
not on the z-axis, the direction of the electric field isYour answerChoose one option.
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The input-output relationship of an LTI system is given below.
For an input
shown below 
, the peak value of the output when
passes through
is _____.Your answerChoose one option.
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In an ac main, the rms voltage
, rms current
and power
are measured as:
,
and
(errors are with respect to readings). The percentage error in calculating the power factor using these readings isYour answerChoose one option.
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