ECE :: Measurements and Instrumentation
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The current through a resistance R is shown in figure. The computed value of power is
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The resistance in the circuit of the moving coil of a dynamometer wattmeter should be
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What would be the reading of voltmeter as shown in below figure. The voltmeter has a 0-1 V scale and is a 20000 Ω/V meter
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A temperature sensistive transducer is subjected to sudden temperature change. It takes 10 seconds for transducer to reach equilibrium condition (five times time constant). The time taken to reach half of temperature difference will be
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Figure shows a Wheatstone bridge with RTD to one arm. If resistance of RTD = 1020 Ω, the voltage V0 is
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The current passing through a resistance of 100 ± 0.2% Ω is 2 ± 0.5% A. The limiting error in computation of power will be
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If the secondary burden of a CT 15 VA and secondary current is 5 A, the load impedance of CT is
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Consider the following instruments
- Tangent galvanometer
- Rayleigh current balance
- Household energy meter
- Hot wire ammeter
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A 0-150 voltmeter has a guaranteed accuracy of 1% of full scale reading. If actual reading is 83 V, the percentage error is
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In a CRO, the frequency of output of time base generator
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