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

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

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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,

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

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