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Measurement and Instrumentation

Measurement and Instrumentation
A permanent magnet moving coil ammeter is connected in 50 Hz a. c. Circuit in which 5A current is flowing. The meter will read

0 A
None of the listed here
5 A
2.5 A

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Measurement and Instrumentation
A CRO probe has an impedance of 500 kΩ in parallel with a capacitance of 10 pF. The probe is used to measure the voltage between P and Q as shown in figure. The measured voltage will be

 4.38 V.
 5 V.
 3.53 V.
 4.54 V.

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Measurement and Instrumentation
The adjustment of position of shading bands, in an energy meter is done to provide

Breaking torque
Creep compensation
None of the listed here
Friction compensation

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Measurement and Instrumentation
A wattmeter reads 30.34 W. The absolute error in the measurement is - 2.22 W. What is the true value of power?

None of these
 28.12 W.
 32.56 W .
 25.45 W.

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Measurement and Instrumentation
A dynamometer wattmeter can be used for

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

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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 ?

 ±3.5%
 ± 3.0%
 ± 1.5%
 ±0.5%

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