Measurement and Instrumentation
A metal strain gauge has a gauge factor of two. Its nominal resistance is 120 ohms. If it undergoes a strain of 10-5, the value of change of resistance in response to the strain is

 120 Ohm.
 240 Ohm.
 0.0024 Ohm.
 0.0012 Ohm.

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

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