Instrumentation Engineering
2021 · Paper 1
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Complete GATE IN 2021 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 54
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A signal having a bandwidth of 5 MHz is transmitted using the Pulse code modulation (PCM) scheme as follows. The signal is sampled at a rate of 50% above the Nyquist rate and quantized into 256 levels. The binary pulse rate of the PCM signal in Mbits per second is ___.
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In the figure shown, a large multimode fiber with
and
is used for sensing. A portion with the cladding removed passes through a liquid with refractive index
. An LED is used to illuminate the fiber from one end and a paper is placed on the other end, 1 cm from the end of the fiber. The paper shows a spot with radius 1 cm. The refractive index
of the liquid (rounded off to two decimal places) is __________.
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