Question

The pitch of a screw gauge is 1mm and its cap is divided into 100 divisions. When this screw gauge is used to measure the diameter of a wire, then main scale reading is 2 mm and 58^(th) division of circular scale coincides with the main scale. There is no zero error in the screw gage. Then the diameter of the wire is

Answer 1

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Answer 2

Answer:

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$l.c = \frac{1}{100} = 0.01 \\then \: main \: scale \: reading \: is \: 2 mm \\ circular \: scale \: reading = 58\times 0.01 = 0.58mm \\ total \: scale \: reading = 2 + 0.58 = 2.58$