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Measurement and Instrumentation

Measurement and Instrumentation
A transducer measures a range of 0 – 200 N force with a resolution of 0.15 percent of full scale. What is the smallest change which can be measured by this transducer ?

 0.3 N
 0.15 N
 6.66 N
 3.33 N

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Measurement and Instrumentation
The total current I = I1 + I2 in a circuit is measured as I1 = 150 ± 1A , I2 = 250 ± 2A, where the limits of error are as standard deviations. I is measured as

 (400 ± 3) A
 (400 ± 1.5) A
 (400 ± 2.24) A
 (400 ± 1) A

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Measurement and Instrumentation
Most sensitive galvanometer is

Duddle galvanometer
Spot ballastic galvanometer
Elastic galvanometer
Vibration galvanometer

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Measurement and Instrumentation
0-150 V voltmeter has an accuracy of 1% of full-scale reading. The voltage measured by the instrument is 75 V. The limiting error is

 4%
 3%
 1%
 2%

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Measurement and Instrumentation
The inductance of a certain moving iron ammeter is expressed as L = 2+5θ-θ2 µH. The control spring torque is 2 × 10-6 Nm/radian. Find the deflection in radians for a current of 2A.

 2
 1
 4
 5

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Measurement and Instrumentation
Commonly used instruments in power system measurement are

Electrostatic
Induction
Moving coil or iron
Rectifier

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