Measurement and Instrumentation
The effect of stray magnetic fields on the actuating torque of a portable instrument is maximum when the operating field of the instrument and stray fields are

 parallel.
 perpendicular.
 inclined at 60o.
 inclined at 30o.

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Measurement and Instrumentation
It can be stated that

CT operates at almost the same flux density as a PT
CT operates with considerably lower flux density than a PT
No generalisation can be made with regard to the flux densities in CT and PT
CT operates with a higher flux density than PT

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Measurement and Instrumentation
Assertion (A) : It is always desirable to take the reading of an indicating instrument very close to the full scale reading. Reason (R) : Accuracy of an indicating instrument is maximum at the full scale deflection and error increases as reading comes closer to the beginning of the scale.

 A is false bur R is true
 Both A and R are true and R is the correct explanation of A
 A is true but R is false
 Both A and R are true but R is NOT the correct explanation of A

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