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Measurement and Instrumentation

Measurement and Instrumentation
Which of the following essential featuresis possessed by an indicating instrument?

Controlling device
All of the listed here
Damping device
Deflecting device

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Measurement and Instrumentation
Which of the following quantities consists of S.I. unit as Hertz?

 Force
 Charge
 Power
 Frequency

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Measurement and Instrumentation
A DC potentiometer is designed to measure up to about 2V with a slide wire of 800 mm. A standard cell of emf 1.18 V obtains balances at 600 mm. A test cell is seen to obtain balance at 680 mm. The emf of test cell is

 1 V.
 1.7 V.
 1.34 V.
 1.5 V.

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Measurement and Instrumentation
The total current I = I1 + I2 in a circuit is measured as I1 = 150 ± 1A , I2 = 250 ± 2A, where the limits of error are as standard deviations. I is measured as

 (400 ± 2.24) A
 (400 ± 1.5) A
 (400 ± 3) A
 (400 ± 1) A

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Measurement and Instrumentation
In a moving iron meter, the deflecting torque is proportional to

Current through the coil
Squareroot of the measurand
Sine of the measurand
Square of the current through the coil

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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

 11.1 V.
  10.6 V.
 15 V.
 12.6 V.

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