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NEET UG PHYSICS MCQ: UNITS & MEASUREMENTS

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N{N} division on main scale of a vernier callipers coincide with (N+1)(N+1) division of the vernier scale if each division on main scale is of "aa" units, least count of instrument is
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Correct option: B
aN+1\frac{a}{N+1}
Option B (aN+1\frac{a}{N+1}) is correct because the least count is calculated by finding the difference between one main scale division and one vernier scale division.

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