Measurement and Instrumentation 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? 0.73 0.65 1 0.84 0.73 0.65 1 0.84 ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation The calibration of a voltmeter can be carried out by using An ammeter. A frequency meter. A potentiometer. A function generator. An ammeter. A frequency meter. A potentiometer. A function generator. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation A DC potentiometer is designed to measure up to about 2V with a slide wire of 800 mm. A standard cell of emf 1.18 V obtains balances at 600 mm. A test cell is seen to obtain balance at 680 mm. The emf of test cell is 1 V. 1.7 V. 1.5 V. 1.34 V. 1 V. 1.7 V. 1.5 V. 1.34 V. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation Swamping resistance is used to compensate both A and B. error due to strong magnetic field. none of these. error due to temperature true variations. both A and B. error due to strong magnetic field. none of these. error due to temperature true variations. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation Figure show an RC potentiometer to measure AC voltage. It is desire that Vo/Vi should be independent of frequency. The value of C shoud be 10 µF. 0.1 µF. 0.09 µF. 11 µF. 10 µF. 0.1 µF. 0.09 µF. 11 µF. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation The errors mainly caused by human mistakes are instrumental error. observational error. gross error. systematic error. instrumental error. observational error. gross error. systematic error. ANSWER DOWNLOAD EXAMIANS APP
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