Instrumentation Engineering
2017 · Paper 1
Take it one question at a time. Try an answer, then check your understanding.
Complete GATE IN 2017 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 46–48 of 65. Imported answers require review unless explicitly marked reviewed.
Question 46
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The power delivered to a single phase inductive load is measured with a dynamometer type wattmeter using a potential transformer (PT) of turns ratio 200:1 and the current transformer (CT) of turns ratio 1:5. Assume both the transformers to be ideal. The power factor of the load is 0.8. If the wattmeter reading is 200 W, then the apparent power of the load in kVA is __________.
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The unbalanced voltage of the Wheatstone bridge, shown in the figure,
is measured using a digital voltmeter having infinite input impedance and a resolution of 0.1 mV. If
, then the minimum value of
in
to create a detectable unbalanced voltage is __________.Log in to check the answer
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In the a.c. bridge, shown in the figure,
and
. If the bridge is balanced at a frequency
, the value of
in rad/s is ________. 
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