Measurement and Instrumentation
The resistance of a circuit is found by measuring current flowing and the power fed into the circuit. If the limiting errors in the measurement of power and current are ± 1.5% and ± 1.0% respectively, the limiting error in the measurement of resistance

 ± 2.5%
 ± 1%
 ± 3.5%
 ± 1.5%

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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.

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

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