Measurement and Instrumentation
The limiting errors of measurement of power consumed by and the current passing through a resistance are ±1.5% and ±1% respectively. What is the limiting error ( in %) of measurement of resistance ?

 ±3.5%
 ± 1.5%
 ± 1%
 ± 2.5%

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

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

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