Physics · 2021
JEE Main · 3 August 2021, Shift 1 · Q1
Least count corresponding to the main scale and circular scale of a screw gauge are 0.5 mm and 0.005 mm, respectively. A wire of diameter 2.675 mm is…
Least count corresponding to the main scale and circular scale of a screw gauge are $\displaystyle 0.5$ mm and $\displaystyle 0.005$ mm, respectively. A wire of diameter $\displaystyle 2.675$ mm is measured with the screw gauge. What would be the reading of divisions on circular scale of the screw gauge, if the zero error of the screw gauge is +$\displaystyle 0.02$ mm ?
Official answer
(3)
$\displaystyle 39$
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