Question

In a screw gauge, 5 complete rotations of the screw cause it to move a linear distance of 0.25 cm. There are 100 circular scale divisions. The thickness of a wire measured by this screw gauge gives a reading of 4 main scale divisions and 30 circular scale divisions. Assuming negligible zero error, the thickness of the wire is : (1) 0.4300 cm (2) 0.2150 cm (3) 0.3150 cm (4) 0.0430 cm

Answer 1

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