Instrumentation Engineering
GATE IN topic:sensors-industrial-instrumentation PYQs
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Questions 51–53 of 53. Imported answers require independent review unless marked reviewed.
Question 50
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A resistance temperature detector (RTD) is connected to a circuit, as shown in the figure. Assume the opamp to be ideal. If
, then the value of
is ________. 
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The magnetic flux density of an electromagnetic flowmeter is 100 mWb/m². The electrodes are wall-mounted inside the pipe having a diameter of 0.25 m. A voltage of 1 V is generated when a conducting fluid is passed through the flowmeter. The volumetric flowrate of the fluid in m³/s is ________.
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The junction semiconductor temperature sensor shown in the figure is used to measure the temperature of hot air. The output voltage
is 2.1 V. The current output of the sensor is given by
where
is the temperature in K. Assuming the opamp to be ideal, the temperature of the hot air in °C is approximately ________. 
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