In a Vernier calipers, one main scale division is \( x \) \( \mathr...

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In a Vernier calipers, one main scale division is \( x \)
\( \mathrm{P} \)
\( \mathrm{cm} \) and \( \mathrm{n} \) division of the Vernier scale coincide with
W
\( (n-1) \) division of the main scale. The least count (in \( \mathrm{cm}) \) of the calipers is:
(1) \( \left(\frac{n-1}{n}\right) x \)
(2) \( \left(\frac{n x}{n-1}\right) \)
(3) \( \frac{x}{n} \)
(4) \( \left(\frac{x}{n-1}\right) \)
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