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.
 0.0024 Ohm.
 0.0012 Ohm.
 240 Ohm.

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Measurement and Instrumentation
The measurement of a quantity

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

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Measurement and Instrumentation
If an inductance L is connected in one arm of bridge and resistance R1, R2, R3 in other three arms

 The bridge can not be balanced.
 The bridge can be balanced.
 The bridge is balanced for some specified value of frequency.
 The bridge is balanced for some specified value of R1, R2, R3.

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