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Measurement and Instrumentation

Measurement and Instrumentation
Purely mechanical instrument cannot be used for dynamic measurements because they have

All of these
 higher response time.
 large time constant.
 high inertia.

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Measurement and Instrumentation
A moving coil of a meter has 100 turns, and a length and depth of 10 mm and 20 mm respectively. It is positioned in a uniform radial flux density of 200 mT. The coil carries a current of 50 mA. The torque on the coil is

 100 µNm.
  200 µNm.
 2 µNm.
 1 µNm.

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Measurement and Instrumentation
A moving iron ammeter may be compensated for frequency errors by

A series inductance
Shunt capacitance
A shunt resistance
Series resistance

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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
4 kWh
1 kWh

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

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

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Measurement and Instrumentation
To measure an A. C. voltage by using an A.C. potentiometer, it is desirable that the supply for the potentiometer in taken

From a source which is not the same as the unknown voltage
Any of the above
From the same source as the unknown voltage
From a battery

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