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Measurement and Instrumentation

Measurement and Instrumentation
A thermo couple ammeter gives full scale deflection of 10 A, when it reads one fifth of the scale, the current will be

 2 A.
  4.47 A.
 4 A.
 5.78 A.

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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

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

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Measurement and Instrumentation
In a dynamometer wattmeter, the moving coil is the

Potential coil
Current coil
Current coil and potential coil
None of the listed here

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Measurement and Instrumentation
The meter constant of an energy meter is 1500 rev/kWh, the disc makes 3000 revolution in a given time. The energy consumed is

2 kWh
3 kWh
1 kWh
4 kWh

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Measurement and Instrumentation
The problem of Electrostatic coupling in a transformer is acute at

Power frequencies
Low frequencies
High load on the transformer
High frequencies

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Measurement and Instrumentation
The Metric System is also called as:

None of these
 SI
 MKS system
 CGS

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