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Measurement and Instrumentation

Measurement and Instrumentation
A 1 mA meter is to be converted to 1 A ammeter. The meter resistance is 100 Ω. The value of shunt resistance

 100 Ω.
 0.001 Ω.
 0.1001 Ω.
 1000 Ω.

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Measurement and Instrumentation
The resistance of a circuit is measured from the relation R= P/I2, where P is the power fed into the circuit and I is the current flowing through it. If the limiting errors in the measurement of power and current are respectively ± 1.0% and ± 1.0%, then what will be the limiting error in measurement of resistance ?

 ± 1.5%
 ±3.5%
 ± 3.0%
 ±0.5%

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Measurement and Instrumentation
The controlling torque of an indicating instrument ______ as the deflection of the moving system increases.

Remains same
Decreases
None of the listed here
Increases

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Measurement and Instrumentation
Relative error is same as

None of these
 ratio of absolute error and true value.
 absolute error.
 true error.

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Measurement and Instrumentation
Jewels are used in instruments for the purpose of

Bearing
Damping
Suppressing noise
Torque control

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Measurement and Instrumentation
A set of independent current measurements taken by four observers was recorded as : 117.02 mA, 117.11 mA, 117.08 mA and 117.03 mA. What is the range of error ?

 ± 0.056
 ± 0.065
 ± 0.054
 ± 0.045

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