Measurement and Instrumentation The internal resistance of a milli-ammeter must be very low for high precision. minimum effect on the current in the circuit. high accuracy. high sensitivity. high precision. minimum effect on the current in the circuit. high accuracy. high sensitivity. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation The meter constant of a single phase 240 V induction watthour meter is 400 revolutions per KWh. The speed of the meter disc for a current of 10 Amperes of 0.8 p.f lagging will be 12.8 rpm. 16.02 rpm. 18.2 rpm. 21.1 rpm. 12.8 rpm. 16.02 rpm. 18.2 rpm. 21.1 rpm. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation The resistance offered to the passage of an in-varying current by a column of mercury at the temperature of melting ice of mass 14.4521 gms of uniform cross-sectional area and length 106.3cm is One ohm according to SI units One international ohm Standard ohm One ohm according to working standards One ohm according to SI units One international ohm Standard ohm One ohm according to working standards ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation For power measurement of three phase circuit by two wattmeter method, when the value of power factor is less than 0.5 lagging One of the wattmeter connections will have to be reversed Both give the same readings One of the wattmeters will read zero Pressure coil of the wattmeter will become ineffective. One of the wattmeter connections will have to be reversed Both give the same readings One of the wattmeters will read zero Pressure coil of the wattmeter will become ineffective. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation For measuring an AC voltage by an AC potentiometer it is desirable that the supply for the potentiometer is taken from The same source as the unknown voltage. A source other than the source of unknown voltage. A battery. Any of above. The same source as the unknown voltage. A source other than the source of unknown voltage. A battery. Any of above. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation The ratio of change in output to the change in the input is called sensitivity resolution repeatability precision sensitivity resolution repeatability precision ANSWER DOWNLOAD EXAMIANS APP
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