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When a screw gauge is comletely closed, ...

When a screw gauge is comletely closed, zero of circular scale is 4 divisions abvoe the reference line of graduation. If L.C of screw gauge is `10^(-3)` cm, the zero error is

A

`-4 xx 10^(-3)` cm

B

`+ 4 xx 10^(-3)` cm

C

`- 0.004 ` mm

D

`+ 0.004` mm

Text Solution

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The correct Answer is:
a
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