EXAMIANS
The rectifier instrument is not free from
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In DC potentiometer measurments, a second reading is often taken after reversing the polarities of the DC supply and the unknown voltage and the average of the two reading is taken. This is with a view of eliminate the effects of
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To measure the flux, devices used are based on
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Which one the following statements is correct? The application of the instrument in wrong manner in the procedure of measurement results in a/an
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One single phase wattmeter operating on 230V and 5A for 5 hours makes 1940 revolutions. Meter constant in revolutions is 400. What is the power factor of the land?
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A thermometer having first order dynamics is subjected to a sudden temperature change of 30oc to 150oc. If it has he time constant of 5 sec, what temperature will be indicated by after 5 sec?
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The resistance in the circuit of the moving coil of a dynamometer wattmeter should be
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A metal strain gauge has a gauge factor of two. Its nominal resistance is 120 ohms. If it undergoes a strain of 10-5, the value of change of resistance in response to the strain is
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Assertion (A): A hot wire ammeter has a cramped scale. Reason (R): The heat is proportional to square of current.
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Swamping resistance is used to compensate
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