1.

10 rotations of the cap of a srew gauge is equivalent to 5 mm . The cap has 100 divisons. Find the least count . A reading taken for the diameter of wire with the srew gauge shows four complete rotations and 35 divisions on the circular scale . Find the diameter of the wire.

Answer» Least count ` = ( 0.5)/(100) = 0.005 mm`
The diameter of the wire ` = ( 4 xx 0.5 + 35 xx 0.005 ) mm`
`= 2.175 mm`


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