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

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

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Measurement and Instrumentation
Assertion (A) : It is always desirable to take the reading of an indicating instrument very close to the full scale reading. Reason (R) : Accuracy of an indicating instrument is maximum at the full scale deflection and error increases as reading comes closer to the beginning of the scale.

 Both A and R are true but R is NOT the correct explanation of A
 Both A and R are true and R is the correct explanation of A
 A is false bur R is true
 A is true but R is false

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