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A student measued the diameter of a smal...

A student measued the diameter of a small steel ball using a screw gauge of least count `1.001 cm`. The main scale reading is `5 mm` and zero of circular scale division coincides with 25 divisions above the reference level. If screw gauge has a zero erroof `-0.004 cm`, the correct diameter of the ball is

A

`0.053 cm`

B

`0.525cm`

C

`0.521cm`

D

`0.529cm`

Text Solution

Verified by Experts

The correct Answer is:
D
Diameter of the ball
`=MSR+CSRxx("Least count")-` Zero error
`=0.5 cm+25xx0.001-(-0.004)`
`=0.5+0.025+0.004=0.529cm`.
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