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Measurement and Instrumentation

Measurement and Instrumentation
Which meter is suitable for the measurement of 10mV at 50MHz?

Moving iron voltmeter
CRO
Moving coil voltmeter
VTVM

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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 postioned in a uniform radial flux density of 200 mT. The coil carries a current of 50 mA. The torque on the coil is

 100 Nm.
 1 Nm.
  200 Nm.
 2 Nm.

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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
The EMF of Weston standard cell is measured using

Moving- iron meter
Potentiometer
Digital Volt meter
Moving-coil meter

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Measurement and Instrumentation
______ instruments are most sensitive.

Dynamometer
Permanent magnet moving coil
Moving iron
Hot wire

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Measurement and Instrumentation
Some wire- wound resistors have bifilar winding. This type of winding is used to

Increase the thermal stability
Reduce the tolerance
Reduce the inductance of winding
Double the power rating of the resistor

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