Q. 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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Q. 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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Q. Consider the following instruments

1. Tangent galvanometer
2. Rayleigh current balance
3. Household energy meter
4. Hot wire ammeter

Out of above absolute instruments are

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Q. 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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Q. In a CRO, the frequency of output of time base generator

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Q. If A = 131 ± 4 and B = 106 ± 4, the percentage range of doubt in A - B is

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Q. Two resistance R1 and R2 are connected in series R1 = 528 ± 5 Ω and R2 = 325 ± 3Ω. The total resistance will be

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Q. The function of shunt in an ammeter is to

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Q. Which of the following does not use the principle of change in inductance?

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Q. It is necessary to measure the amplitudes of two signals and also the phase difference between them. This can be done by using a

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Q. An amplifier has to amplify pulses of 1 H-s duration. The minimum bandwidth of amplifier must be

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Q. A moving coil meter has a resistance of 50 ohms and a full scale deflection current of 20 mA. To convert it into a voltmeter of 0-100 V range, the series resistance should be

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Q. In measuring a resistance by voltmeter-ammeter method, the voltmeter can be connected either across supply or across the resistance. If the resistance is low, the voltmeters should be connected

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Q. Which of the following methods can be used to measure power in a single phase circuit without using wattmeter?

1. One voltmeter, one ammeter
2. Two voltmeters, two ammeter
3. Three voltmeters
4. Three ammeters

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Q. For measurement of surface temperature of solids the elements of RTD is usually in the shape of

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Q. As per BIS, the number of accuracy classes of instrument is

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Q. In most of instruments, the controlling torque is provided by

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Q. A 0-200 V voltmeter has a sensitivity of 1 kΩ per volt. The resistance of voltmeter is

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Q. DC ampere hour meter is an indicating instrument.

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Q. The accuracy of measurement by ohmmeter is very good.

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