Measurement and Instrumentation
The function of shunt in an ammeter is to

Increase the resistance of ammeter
None of the listed here
Increase the sensitivity of the ammeter
By pass the current

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Measurement and Instrumentation
Consider the following statement - 1. The compensating coil of a low power factor wattmeter compensates the effect of the impedance of the current coil. 2. The compensating coil of a low power factor wattmeter compensates the effect of the impedance of the voltage coil circuit.

 1 is true but 2 is false.
 Both 1 and 2 are true.
 Both 1 and 2 are false.
  1 is false but 2 is true.

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Measurement and Instrumentation
Potentiometer method of DC voltage measurement is more accurate than direct measurement using a voltmeter because

 It loads the circuit moderately.
 It loads the circuit to maximum extent.
 It uses centre zero galvanometer instead of voltmeter.
  It does not load the circuit at all.

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