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Measurement and Instrumentation

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

Negative
None of the listed here
Positive
Negligible

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

Permanent magnet
Fluid friction
None of the listed here
Air friction

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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

 0.5 mA.
 100 mA.
 10 mA.
 1mA.

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Measurement and Instrumentation
In induction type ammeter, _____ damping is provided.

Air friction
Eaddy current
None of the listed here
Fluid friction

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Measurement and Instrumentation
The total current I = I1 + I2 in a circuit is measured I1 = 150 ± 3A , I2 = 250 ± 4 A, where the limits of error are given as standard deviations. I is measured as

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

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Measurement and Instrumentation
The full-scale deflection current of an ammeter is 1 mA and its internal resistance is 100°hm. This is to have full deflection when 100V is measured. What is the value of series resistor to be used?

100 K ohms
99.99 ohms
99.99 K ohms
100 ohms

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