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
The measurement of a quantity

  is a comparison of an unknown quantity with standard.
 is a comparison of an unknown quantity with another quantity.
 none of these.
 is a comparison of an unknown quantity with known quantity.

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Measurement and Instrumentation
Assertion (A): A hot wire ammeter has a cramped scale. Reason (R): The heat is proportional to square of current.

 A is false and R is ture.
 Both A and R are true and R is correct explanation of A.
 A is ture and R is false.
 Both A and R are true and R is not correct explanation of A.

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

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

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