Question

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12. When a screw gauge of least count 0.01 mm is used
to measure the diameter of a wire, the reading on
the sleeve is found to be 1 mm and the reading on
the thimble is found to be 27 divisions. (i) What is
the diameter of the wire in cm ? (ii) If the zero
error is + 0.005 cm, what is the correct diameter ?
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Answer 1

Sorry can't answer because I need to send you pictures