Measurement and Instrumentation
Assertion (A): A hot wire ammeter has a cramped scale. Reason (R): The heat is proportional to square of current.

 A is false and R is ture.
 A is ture and R is false.
 Both A and R are true and R is not correct explanation of A.
 Both A and R are true and R is correct explanation of A.

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Measurement and Instrumentation
Assertion (A) : Precision is a necessary prerequisiteof accuracy. Reason (R) : Precision guarantees accuracy.

 Both A and R are true and R is the correct explanation of A
 A is false bur R is true
 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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Measurement and Instrumentation
In AC circuits, the connection of measuring instruments cause loading effect errors which may effect

 magnitude, phase and waveform of the quantity being measured.
 both of above.
 only the magnitude of the quantity being measured.
 only phase of the quantity being measured.

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