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Measurement and Instrumentation

Measurement and Instrumentation
A 0 - 250V voltmeter has a guaranteed accuracy of 2% of full scale reading. What is the percentage of error if it measures 150V?

 5%
 3.33%
 1%
 2%

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Measurement and Instrumentation
______ movement is most expensive.

D'Arsonval movement
Moving iron
Dynamometer
None of the listed here

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Measurement and Instrumentation
A moving iron ammeter produces a full scale torque of 240 μNm with a deflection of 120° at a current of 10 A. The rate of change of self induction (μH/radian) of the instrument at full scale is

 114.6 μH/radian.
 2.0 μH/radian.
 4.8 μH/radian.
 12.0 μH/radian.

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Measurement and Instrumentation
What is the expression for acceleration?

 Mass x velocity
 Force x displacement
 Mass x acceleration
 Change in velocity / time

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Measurement and Instrumentation
In an Anderson bridge, the unknown inductance is measured in terms of

Known inductance
Known capacitance and resistance
Known inductance and resistance
Known resistance

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Measurement and Instrumentation
A metal strain gauge has a gauge factor of two. Its nominal resistance is 120 ohms. If it undergoes a strain of 10-5, the value of change of resistance in response to the strain is

 120 Ohm.
 240 Ohm.
 0.0012 Ohm.
 0.0024 Ohm.

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