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A student measured the length of a rod a...

A student measured the length of a rod and wrote it as `3.50cm`. Which insturment did he use to measure it?

A

(a)A meter scale.

B

(b) A vervier calliper where the `10` divisions in vernier scale matches with `9` division in main scale and scale has `10` divisions in `1cm`.

C

( c ) A screw gauge having `100` divisions in the circular scale and pitch as `1mm`.

D

( d ) A screw gauge having `50` divisions in the circular scale and pitch as `1mm`.

Text Solution

Verified by Experts

The correct Answer is:
B
(b) Measured length of `rod = 3.50 cm`
For vernier scale with `1` main sacle Division = `1mm`
`9` main sale division = `10 Vernier Scale Division,
Least count = `1MSD - `1VSD`
`= 0.1mm`
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