Measurement and Instrumentation
A moving coil of a meter has 100 turns, and a length and depth of 10 mm and 20 mm respectively. It is postioned in a uniform radial flux density of 200 mT. The coil carries a current of 50 mA. The torque on the coil is

 1 Nm.
 2 Nm.
  200 Nm.
 100 Nm.

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

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Measurement and Instrumentation
In AC circuits, the connection of measuring instruments cause loading effect errors which may effect

 magnitude, phase and waveform of the quantity being measured.
 both of above.
 only phase of the quantity being measured.
 only the magnitude of the quantity being measured.

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