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Measurement and Instrumentation

Measurement and Instrumentation
A 0 - 200 V voltmeter has a guaranteed accuracy of 1% of full scale reading. The voltage measured by this instrument is 50 V. What is the limiting error?

 4%
 3%
 2%
 5%

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

VTVM
Moving iron voltmeter
CRO
Moving coil voltmeter

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Measurement and Instrumentation
A DC A-h meter is rated for 15 A, 250 V. The meter constant is 14.4 A-sec/rev. The meter constant at rated voltage may be expressed as

 1000 rev/KWh.
 3600 rev/KWh.
 960 rev/KWh.
 3750 rev/KWh.

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Measurement and Instrumentation
A galvanometer with a full scale current of 10 mA has a resistance of 1000 Ω. The multiplying power (the ratio of measured current to galvanometer current) of 100 Ω shunt with this galvanometer is

 100.
 110.
 11.
 10.

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Measurement and Instrumentation
Commonly used instruments in power system measurement are

Electrostatic
Induction
Rectifier
Moving coil or iron

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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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