EXAMIANS
In a moving coil instrument, the deflecting torque is proportional to
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A dynamometer wattmeter can be used for
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An oscilloscope indicates
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The repeat accuracy of an instrument can be judged from its
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An electric pyrometer is an instrument used to measure
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A DC A-h meter is rated for 15 A, 250 V. The meter constant is 14.4 A-sec/rev. The meter constant at rated voltage may be expressed as
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Electrostatic instruments are normally used for
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A sampling wattmeter is used to measure the average power of a load. The peak to peak voltage of a square wave is 10 V and the current is triangular wave of 5 Amp P-P as shown in the figure. The period is 20 ms. The reading in W will be
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A resistance is measured by the voltmeter-ammeter method employing dc excitation and a voltmeter of very high resistance connected directly across the unknown resistance. If the voltmeter and ammeter reading are subject to maximum possible errors of ± 2.4 % and ± 1.0 % respectively, then the magnitude of the maximum possible percentage error in the value of resistance deduced from the measurement is nearly
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A current of is measured with a thermocouple, 5 A full scale meter. What is the meter reading?
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