Electrical And Electronic Measurement MCQs

A galvanometer with a full scale scurrent of 10 mA has a resistance of 10000 Q. The multiplying power (the ratio of measured current to galvanometer current) of a 100 Q shunt with this galvanometer is

A DC ammeter has a resistance of 0.1Q and its current range is 0-100A. If the range is to be extended to 0-500A, the meter requires the following shunt resistance

Two wattmeters, which are connected to measure the total power on a three phase system supplying a balanced load, read 10.5 kW and ?2.5 kW, respectively. The total powere and the power factor, respectively, are

The principle of bridge duplex working involves

The resistances 100 LI ? 5 and * 15 Ll are connected in series. If the errors are specified as standard deviations, theresultant error will be

A 35 V dc supply is connected across a resistance of 600 in series with an unknown resistance 111. A voltmeter having a resistance of 1.2 kL2 is connected across 600Q resistance and reads 5V. The value of resistance Rx will be

'Creep' in energy meters can be prevented by

An integrating digital voltmeter measures

Which of the following can be considered to be the advantages of Maxwell's inductance-capacitance bridge when compared to other types of bridges? I. Balance equation of real part is independent of that of imaginary part. 2. Frequency terms does not figure in the equation. 3. When balance is achieved, the value of capacitance multiplied by resistances gives the value of inductance. The bridges is capable of measuring 'Q' of coil of a very wide range, that is, from 1 to 200. Select the correct answer using the codes given below :Codes :