Measurement and Instrumentation
In a ballistic galvanometer, the deflecting torque is proportional to

Sine of measured
Square of current through coil
The current through coil
Square-root of current through coil

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

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