Measurement and Instrumentation
The disc of an instrument using eddy current damping should be of

Conducting and non magnetic material
Non conducting and magnetic material
None of the listed here
Conducting and magnetic material

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

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