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Measurement and Instrumentation

Measurement and Instrumentation
In a gravity controlled instrument, the deflection angle is proportional

Measurand
Sine inverse of measurand
Square of the measurand
Sine of the measurand

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Measurement and Instrumentation
Which of following is a vector quantity?

 Relative permeability.
 Magnetic potential.
 Flux density.
 Magnetic field intensity.

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Measurement and Instrumentation
In a wheatstone bridge, a change of 6 Ω in the unknown arm of bridge is required to produce a change in deflection of 2.4 mm of the galvanometer. The sensitivity is

 0.8 mm/Ω
 0.4 mm/Ω
 5.0 mm/Ω
 2.5 mm/Ω

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Measurement and Instrumentation
The circuit in figure is used to measure the power consumed by the load. The current coil and the voltage coil of the wattmeter have 0.02 Ω and 1000 Ω resistance respectively. The measured power compared to the load power will be

 0.2% less.
 0.4 more.
 0.2% more.
 0.4% less.

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Measurement and Instrumentation
An average reading digital multimeter reads 10 V when fed a triangular wave, symmetric about the axis. For the same input, an rms reading meter will read

 20√3.
 10.
  10√3.
 20.

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Measurement and Instrumentation
A 50 Hz bar primary CT has a secondary with 500 turns. The secondary supplies 5 A current into a purely resistive burden of 1Ω. The magnetizing ampere-turn is 200. The phase angle between the primary and secondary current is

  4.6o.
 94.6o.
 175.4o.
 85.4o.

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