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Find the thickess of the wire The main s...

Find the thickess of the wire The main scale division is of `1mm` In a complete rotation the screw advances by `1mm` and the circular scale has 100 devisions Zero error of the screwgase is 0.007mm .
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Text Solution

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Excess reading (Zero error) = - 0.07 It is -0.07mm excess reading which has to be removed (subtracted) so actual reading `=7.95 - (-0.07) = 8.02mm` .
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