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Measurement and Instrumentation

Measurement and Instrumentation
Relative error is same as

 absolute error.
 ratio of absolute error and true value.
 true error.
None of these

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Measurement and Instrumentation
In figure Z1 = 200∠60° ohm. Z2 = 400∠-90° ohm, Z3 = 300∠0° ohm. Then Z4 for bridge to be balanced is

 600∠-150° ohm.
 300∠90° ohm.
 150∠30° ohm.
 400∠-90° ohm.

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Measurement and Instrumentation
To measure an A. C. voltage by using an A.C. potentiometer, it is desirable that the supply for the potentiometer in taken

From the same source as the unknown voltage
From a battery
Any of the above
From a source which is not the same as the unknown voltage

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Measurement and Instrumentation
Which of the quantity consists of SI unit as Candela?

 Velocity
 Impulse
 Luminous intensity
 Force

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Measurement and Instrumentation
In eddy current damping, disc or former is made of a material that is a

Conductor but magnetic
Non conductor and non magnetic
Conductor but non magnetic
Non conductor but magnetic

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Measurement and Instrumentation
A voltmeter using thermocouple measures

 Peak value.
 Average value.
  rms value.
 Peak to peak value.

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