Question

13.
A screw gauge with a pitch of 0.5 mm and a circular
scale with 50 divisions is used to measure the
thickness of a thin sheet of Aluminium. Before
starting the measurement, it is found that when
the two jaws of the screw gauge are brought in
contact, the 45th division coincides with the main
scale line and that the zero of the main scale is
barely visible. What is the thickness of the sheet
if the main scale reading is 0.5 mm and the 25th
division coincides with the main scale line ?
(JEE (
MAIN) - 2016]
(1) 0.50 mm
(2) 0.75 mm
(3) 0.80 mm
(4) 0.70 mm​

Answer 1

3)0.80

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