Instrumentation Engineering
GATE IN exam:gate PYQs
Build your understanding with focused practice from past exam papers.
Questions 21–30 of 650. Imported answers require independent review unless marked reviewed.
Question 21
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A common gate amplifier represents a ______________.
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In the circuit shown, the BJT has a
of 100. The base-emitter junction voltage is 0.65 V. The quiescent collector current,
is ______ mA.
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The maximum signal to quantization noise ratio (SNR) for a 16-bit analog-to-digital converter is approximate ______ dB.
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The Kelvin double bridge is used to measure ______ valued resistances and has ______ resistors in its construction.
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Active strain gauges are connected in a half-bridge configuration to measure strain in a cantilever element. When powered by a voltage source of 10 V, the voltage at the output of the bridge is 1 mV. If the gauge factor is 2.5, the strain in the cantilever element is ______ microstrain.
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A glass pH electrode behaves linearly with an output change of 60 mV per unit change in pH. The measurement reference is set such that a solution of pH 6 produces an output of 60 mV. The pH of a solution that results in an output of −90 mV is _________.
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An analog speech signal contains signals from 200 Hz to 240 Hz. It is sampled at 6 kHz and quantized with 512 levels for pulse code modulation (PCM). The bit rate will be ______ kbps.
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The slope efficiency of a laser diode is 0.5 W/A, and the output optical power at a current of 100 mA is 30 mW. Assuming piece-wise linear characteristics of the laser diode, the threshold current of the laser is ______ mA.
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In a linear element, the measured current is 100 mA ± 2.5% and the measured voltage is 5 V ± 5%. Which of the following options show(s) the consumed power?
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Which of the following statements is/are correct for a thermocouple?
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