Q. In dc tacho generators used for measurement of speed of shaft, frequent calibration is necessary because

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Q. A multimeter can be used as ohmmeter.

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Q. A voltage of about 200 V dc can be measured

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Q. In a low power factor wattmeter, compensation for pressure coil current is provided.

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Q. De Sauty bridge is very widely used due to

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Q. A Weston synchronoscope is a

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Q. In a dynamometer 3 phase power factor meter, the planes of the two moving coils are at

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Q. When deflecting torque and braking torque in an energy meter are zero,

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Q. The sensitivity of a voltmeter using 0-5 mA meter movement is

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Q. Two meters X and Y require 40 mA and 50 mA for full scale deflection. Then

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Q. A dual trace CRO has

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Q. For measuring mutual inductance we can use

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Q. Assertion (A): If the resistance of shunt of an ammeter is increased, the range of ammeter is reduced.

Reason (R): If the series resistance of a voltmeter is increased, the range of voltmeter is increased.

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Q. Two sinusoidal signals of equal amplitude and frequency are applied to X and Y plate of CRO respectively. The observed Lissajous pattern is a straight line. The phase shift between signals is

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Q. The scale of a dynamometer is linear when used as

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Q. Three phase four wire induction energy meter is used to measure

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Q. Thermistors are made of

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Q. The Y plates of a CRO are excited by a voltage 2 sin 100 t and the X plates are not connected. The display would be

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Q. Heating effect of current is used in

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Q. The coils of Drysdale polar potentiometer are wound non-inductively.

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