Measurement and Instrumentation To measure an A. C. voltage by using an A.C. potentiometer, it is desirable that the supply for the potentiometer in taken Any of the above From a source which is not the same as the unknown voltage From a battery From the same source as the unknown voltage Any of the above From a source which is not the same as the unknown voltage From a battery From the same source as the unknown voltage ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation The internal resistance of an ammeter should be Medium Very small Infinity High Medium Very small Infinity High ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation A 0 - 250V voltmeter has a guaranteed accuracy of 2% of full scale reading. What is the percentage of error if it measures 150V? 3.33% 5% 1% 2% 3.33% 5% 1% 2% ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation Which of following statement are correct in case of power factor meter? Both B and C. The deflection is proportional to phase angle between field coil and crossed coil. It consist of two coils mounted at right angles to each other. The restoring torque is provided by a controlling torque. Both B and C. The deflection is proportional to phase angle between field coil and crossed coil. It consist of two coils mounted at right angles to each other. The restoring torque is provided by a controlling torque. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation Assertion (A): A hot wire ammeter has a cramped scale. Reason (R): The heat is proportional to square of current. A is ture and R is false. Both A and R are true and R is not correct explanation of A. Both A and R are true and R is correct explanation of A. A is false and R is ture. A is ture and R is false. Both A and R are true and R is not correct explanation of A. Both A and R are true and R is correct explanation of A. A is false and R is ture. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation A PMMC voltmeter is connected across a series combination of a DC voltage source V1 = 2 V and an AC voltage source V2 = 3sin4t, the voltmeters reads 5 V. (2 + √3/2)V. 0 V. 2 V. 5 V. (2 + √3/2)V. 0 V. 2 V. ANSWER DOWNLOAD EXAMIANS APP
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