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Measurement and Instrumentation

Measurement and Instrumentation
In a moving coil instrument, the deflecting torque is proportional to

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

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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

 12.6 V.
 15 V.
  10.6 V.
 11.1 V.

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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

 ± 7.5 %
 ± 1.5%
 ± 20%
 ± 2.5%

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Measurement and Instrumentation
What is the name of physical quantities which are independent of each other?

 Fundamental quantity
 Derived quantity
None of these
 Numerical quantity

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Measurement and Instrumentation
Most sensitive galvanometer is

Elastic galvanometer
Spot ballastic galvanometer
Vibration galvanometer
Duddle galvanometer

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Measurement and Instrumentation
When checked with an ohm meter an open resistor reads

  high but within tolerance.
  zero.
  low but not zero.
  infinite.

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