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Q.

A screw gauge gives the following reading when used to measure the diameter of a wire. main scale reading : 0mm Circular scale reading: 52 divisions Given that 1 mm on main scale correspond to 100 divisions of the circular scale. The diameter of wire from the above data is

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a

0.026 cm

b

0.052 cm

c

0.52 cm

d

0.005 cm

answer is B.

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Detailed Solution

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Reading = pitch scale reading +(head scale coincidance × LC)
=0+52×1100=0.52 mm=0.052 cm

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