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

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

ANSWER DOWNLOAD EXAMIANS APP

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.

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

ANSWER DOWNLOAD EXAMIANS APP