1.

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

Answer»

`0.052` cm
`0.026` cm
`0.005` cm
`0.52` cm

Solution :SCREW pitch `=1mm`
`:.` LEAST COUNT `=(1)/(100)mm=0.01mm=0.001cm`
`:.` Diameter of the wire is `52xx0.001cm=0.052cm`
So, the correct choice is `(a)`.


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