Measurement and Instrumentation
A Manganin swap resistance is connected in series with a moving coil ammeter consisting of a milli ammeter and a suitable shunt in order to

  Minimize the effect of temperature variation.
 Obtaine large deflecting torque.
 Minimize the effect of stray magnetic fields.
 Reduce the size of the meter.

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Measurement and Instrumentation
A resistance of 105 ohms is specified using significant figures as indicated below : 1. 105 ohms 2. 105.0 ohms 3. 0.000105 mega ohms Among these,

 1 represents greater precision than 2 and 3.
 2 represents greater precision but 1 and 3 represent same precision.
 1, 2 and 3 represent same precision.
 2 and 3 represent greater precision than 1.

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