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One centimetre on the main scale of vern...

One centimetre on the main scale of vernier callipers is divided into ten equal parts. If 10 divisions of vernier scale coincide with 8 small divisions of the main scale, the least count of the callipers is

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The correct Answer is:
`8`
`1/2 mv^(2)=(-Kqe)/(r)`
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