Measurement and Instrumentation
A set of independent current measurements taken by four observers was recorded as : 117.02 mA, 117.11 mA, 117.08 mA and 117.03 mA. What is the range of error ?

 ± 0.045
 ± 0.065
 ± 0.054
 ± 0.056

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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 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.
 A is false and R is ture.

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