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In a vernier callipers, 1 cm of the main...

In a vernier callipers, `1 cm` of the main scale is devided into `20` equal parts. `19` divisions of the main scale coincide with `20` divisions on the vernier scale . Find the least count of the instrument.

Text Solution

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The correct Answer is:
B, C
The value of one main scale division = `1/ (20) cm`
Number of divisions on vernier scale `= 20`
`LC = ("value of one main scale division")/("Number of divisions on vernier scale")`
`(1/20)/20 = 1 /(400) = 0.0025 cm`.
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