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Measurement and Instrumentation

Measurement and Instrumentation
In a moving coil instrument, the deflecting torque is proportional to

Sine of the measurand
Squareroot of the current
Current
Square of the current

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Measurement and Instrumentation
Two voltmeters have the same range 0-400V. The internal impedance are 30,000 Ohms and 20,000 Ohms. If they are connected in series and 600V be applied across them, the readings are

360V and 240V
300V each
400V and 200V
One of the meters out of the range and other 100V

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Measurement and Instrumentation
A meter has a full-scale deflection of 90o at a current of 1 A. The response of the meter is square law. Assuming spring control, the current for a deflection at 45o will be

 0.25 A.
 0.70 A.
 0.50 A.
 0.67 A.

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Measurement and Instrumentation
The household energymeter is

None of the listed here
An integrating instrument
An indicating instrument
A recording instrument

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Measurement and Instrumentation
The resistance of a circuit is found by measuring current flowing and the power fed into the circuit. If the limiting errors in the measurement of power and current are ± 1.5% and ± 1.0% respectively, the limiting error in the measurement of resistance

 ± 3.5%
 ± 1%
 ± 2.5%
 ± 1.5%

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Measurement and Instrumentation
Relative error is same as

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

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MORE MCQ ON Measurement and Instrumentation

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