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

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

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Measurement and Instrumentation
Which of following statement are correct in case of power factor meter?

 The deflection is proportional to phase angle between field coil and crossed coil.
 Both B and C.
 It consist of two coils mounted at right angles to each other.
 The restoring torque is provided by a controlling torque.

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Measurement and Instrumentation
In measurement system, the function of the signal manipulating elements is to

 change the magnitude of the input signal while retaining its identity.
 to perform linear operation like addition and multiplication.
 to perform non liner operation like clipping filtering, chopping and clamping.
 change the quantity under measurement to an analogues signal.

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