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A student measured the diameter of a sma...

A student measured 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 error of `-0.004 cm`, the correct diameter of the ball is

A

`0.529 cm`

B

`0.521 cm`

C

`0.503 cm`

D

`0.525 cm`

Text Solution

Verified by Experts

The correct Answer is:
A
Measured dimension of the half = Reading of serew gange
`= MSR + VSR xxLC+ "zero error"`
` = 0.5 cm + 25 xx 0.001 cm + 0.004 cm = 0.529 cm`
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