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Measurement and Instrumentation

Measurement and Instrumentation
In a single phase energy meter, braking torque is provided by

Fluid friction
None of the listed here
Air friction
Permanent magnet

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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

 2%
 1%
 3%
 4%

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Measurement and Instrumentation
It is found that 10A current passes through a resistor of 10°hms. The resistor has 5% tolerance . The error in measurement of current can be as high as 5%. What is max error in measurement of power, calculated from measured value of I and the nominal value of resistor?

150W
200W
50W
100W

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Measurement and Instrumentation
The material of the shunt should have _______ temperature co-efficient of resistance.

Negative
Positive
None of the listed here
Negligible

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Measurement and Instrumentation
A slide wire potentiometer has 10 wires of 1 m each. With the help of a standard voltage source of 1.018 V it is standardised by keeping the jockey at 101.8 cm. If the resistance of the potentiometer wires is 1000 ohm, then the value of the working current will be

 10 mA.
 100 mA.
 1mA.
 0.5 mA.

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Measurement and Instrumentation
A permanent magnet moving coil ammeter is connected in 50 Hz a. c. Circuit in which 5A current is flowing. The meter will read

0 A
None of the listed here
5 A
2.5 A

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