Instrumentation Engineering
GATE IN year:2026 PYQs
Build your understanding with focused practice from past exam papers.
Questions 61–65 of 65. Imported answers require independent review unless marked reviewed.
Question 61
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In the phase-locked-loop circuit shown below, the output of the VCO is a digital square wave.
If the input is a square wave at 10 kHz, the steady state frequency of the output is ______ kHz. (rounded off to the nearest integer)
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A digital counter increments its count every 0.1 μs. The counter is used in an instrument to measure frequency. The counter is operated for one period of the input signal to the instrument to measure its frequency. The input signal is approximately at 100 kHz. The maximum error in the measured frequency is _____ kHz. (rounded off to the nearest integer)
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A current carrying semiconductor of thickness 0.7 mm is placed in a transverse magnetic field. The measured Hall voltage is 0.9 mV and the current is 6 mA. If the Hall coefficient is
m³/C, the value of the incident magnetic field is ______ T. (rounded off to two decimal places)Log in to check the answer
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For a fiber Bragg grating-based sensor, the shift in the Bragg wavelength gives information about the value of the measured. For a Bragg wavelength of 1550 nm and effective index of 1.44, the grating period is ______ nm.
(rounded off to two decimal places)
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A photodiode has a responsivity 0.8 A/W. If the input optical power to the photodiode is 2 mW, the power delivered to a 50 Ω load is ______ μW.
(rounded off to the nearest integer)
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