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Measurement and Instrumentation

Measurement and Instrumentation
A galvanometer has

Eddy current damping
Air friction damping
Spring coil damping
Fluid friction damping

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Measurement and Instrumentation
The coil of a moving coil meter has 100 turns, is 40 mm long and 30 mm wide. The control torque is 240×10-6 N-m on full scale. If magnetic flux density is 1Wb/m2 range of meter is

 1 mA.
 4 mA.
 2 mA.
 3 mA.

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Measurement and Instrumentation
The ratio of change in output to the change in the input is called

 resolution
 sensitivity
 precision
 repeatability

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Measurement and Instrumentation
For a circuit given that I = 2 ± 5 % A, R = 100 ± 0.2 % Ω the limiting error in the power dissipation I2 R in the resistor R is

 10.2%
 1.2%
 5.2%
 25.2%

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Measurement and Instrumentation
The resistance can be measured most accurately by

Multimeter
Voltmeter-ammeter method
Megger
Bridge method

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Measurement and Instrumentation
One single phase wattmeter operating on 230V and 5A for 5 hours makes 1940 revolutions. Meter constant in revolutions is 400. What is the power factor of the land?

1
0.65
0.84
0.73

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MORE MCQ ON Measurement and Instrumentation

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