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Measurement and Instrumentation

Measurement and Instrumentation
A 1 mA meter is to be converted to 1 A ammeter. The meter resistance is 100 Ω. The value of shunt resistance

 1000 Ω.
 100 Ω.
 0.1001 Ω.
 0.001 Ω.

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Measurement and Instrumentation
In a wheatstone bridge, a change of 6 Ω in the unknown arm of bridge is required to produce a change in deflection of 2.4 mm of the galvanometer. The sensitivity is

 0.8 mm/Ω
 5.0 mm/Ω
 0.4 mm/Ω
 2.5 mm/Ω

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Measurement and Instrumentation
To measure 5 volts, if one selects a 0-100 volt range voltmeter which is accurate with in ± 1%, then the error in this measurement may be up to

 ± 20%
 ± 2.5%
 ± 1.5%
 ± 7.5 %

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Measurement and Instrumentation
An induction wattmeter can be used for

Any of the listed here
Dc only
Ac only
Both DC and AC

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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

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

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Measurement and Instrumentation
The resistance of a circuit is measured from the relation R= P/I2, where P is the power fed into the circuit and I is the current flowing through it. If the limiting errors in the measurement of power and current are respectively ± 1.0% and ± 1.0%, then what will be the limiting error in measurement of resistance ?

 ± 3.0%
 ± 1.5%
 ±3.5%
 ±0.5%

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