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
Pressure coil of the wattmeter will become ineffective.
One of the wattmeters will read zero
Both give the same readings

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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.

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

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