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Measurement and Instrumentation

Measurement and Instrumentation
For the AC bridge circuit shown in figure at balance the value of Rd will be

 (Ra/Rc).Rb.
 (Rc/Rb).Ra.
 (Rc/Ra).Rb.
 (Rb/Rc).Ra.

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Measurement and Instrumentation
Which of the following meter is most suitable for measuring radio frequency currents?

  Thermocouple meter.
 VTVM.
 Moving - coil meter.
 Moving - iron meter.

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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

4 kWh
2 kWh
3 kWh
1 kWh

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Measurement and Instrumentation
Which devices used to measure the temperature of an object ?

 Odometer
 Thermometers
 Poteintiometer
 Galvanometer

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Measurement and Instrumentation
Instrument transformers are

Power transformers
Pottential transformers
Current transformers
Both current and potential transformers

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Measurement and Instrumentation
In a ballistic galvanometer, the deflecting torque is proportional to

Square-root of current through coil
Square of current through coil
The current through coil
Sine of measured

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