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Screw gauge is said to have a negative e...

Screw gauge is said to have a negative error.

A

when circular scale zero coincides with base line of main scale,

B

when circular scale zero is above the base line of main scale.

C

when circular scale zero is below the base line of main scale.

D

None of the above.

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The correct Answer is:
B
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DC PANDEY-EXPERIMENTS-Single Correct
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