A pointer of an instrument once deflected returns to zero position, when the current is removed due to
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In hot wire instrument, the sensing wire is made of
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What should be the size of the slide wire of the potentiometer to make it to achieve high accuracy?
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Which of the following is not an integrating instrument?
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The deflecting torque in an instrument may be produced
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To take care of change in frequency of the A.C current, while using a moving iron type instrument
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he advantages of moving coil permanent magnet type instrument are
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A PMMC type voltmeter, having a full-scale reading of 250 V and an internal resistance of 400 kilo-ohms, is connected with the series resistance of 100 kilo-ohms. Calculate the sensitivity of the voltmeter (in Ohms/Volts).
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In eddy-current damping systems, the disc is usually made of
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Which of the following types of instrument can be used for D.C only?
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A moving iron type ammeter has few turns of thick wire so that
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The use of _____ instruments is merely confined within laboratories as stand¬ardizing instruments.
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Which of the following instruments indicate the instantaneous value of the electrical quantity being measured at the time at which it is being measured ?
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. _____ instruments are those which measure the total quantity of electricity delivered in a particular time.
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Which of the following devices may be used for extending the range of instruments ?
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An induction meter can handle current upto
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For handling greater currents induction wattmeters are used in conjunction with
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The household energy meter is
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In majority of instruments damping is provided by
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In a portable instrument, the controlling torque is provided by
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Electrical Measurements and Instruments Quiz
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