JEE Main Physics question

Physics Units and Measurement JEE Main

**Assertion:** Out of three measurements ; and , the last one is most accurate. **Reason:** In every measurement, only the last significant digit is not accurately known.

(A)Assertion is True, Reason is True; Reason is correct explanation for Assertion
(B)Assertion is True, Reason is True; Reason is not correct explanation for AssertionCorrect
(C)Assertion is True, Reason is False
(D)Assertion is False, Reason is True

Answer: (B)

Solution

carries the most significant figures and hence the smallest relative uncertainty, so it is the most accurate — the Assertion is true. The Reason is a true

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Question ID VK-157517