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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

2.5 A
5 A
None of the listed here
0 A

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Measurement and Instrumentation
The household energymeter is

An integrating instrument
None of the listed here
An indicating instrument
A recording instrument

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Measurement and Instrumentation
When a potentiometer is used for measurement of voltage of an unknown source, the power consumed in the circuit of the unknown source under null condition is

 high.
 ideally zero.
 small.
 very high.

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Measurement and Instrumentation
The controlling torque of an indicating instrument ______ as the deflection of the moving system increases.

Increases
Decreases
Remains same
None of the listed here

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Measurement and Instrumentation
What is the approximate input impedance of a CRO?

 100 MΩ
 1 MΩ
 0
 10 MΩ

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Measurement and Instrumentation
A sinusoidal signal waveform, when observed on an oscilloscope, has a peak to peak amplitude of 6 cm. If the vertical sensitivity setting is 5 v/cm, then rms value of the voltage will be

  10.6 V.
 15 V.
 12.6 V.
 11.1 V.

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