Measurement and Instrumentation
Comparison methods are used

 because they take least time in measurement.
 when a high accuracy of measurement is required.
 because they are most simple.
 because they are expensive.

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

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