Instrumentation Engineering
2026 · Paper 1
Take it one question at a time. Try an answer, then check your understanding.
Complete GATE IN 2026 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 64–65 of 65. Imported answers require review unless explicitly marked reviewed.
Question 64
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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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