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Measurements 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 correct explanation of A
Both A and R are true but R is not correct explanation of A
A is true R is false
A is false R is true
Correct Answer:
Both A and R are true and R is correct explanation of A
Explanation:
Since heating ∝ I
2
, scale is cramped.
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