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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

0.521 cm

B

0.525 cm

C

0.053 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"`
= `5 mm + 25 xx 0.001 cm`-(-0.004) cm
=`0.5 cm + 25 xx 0.001 cm-(-0.004) cm`
= 0.529 cm.
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