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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 `0.001 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

0.525 cm

C

0.521 cm

D

0.529 cm

Text Solution

Verified by Experts

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