13. A screw gauge with a pitch of 0.5 mm and a circularscale with 50 divisions is used to measure thethickness of a thin sheet of Aluminium. Beforestarting the measurement, it is found that whenthe two jaws of the screw gauge are brought incontact, the 45th division coincides with the mainscale line and that the zero of the main scale isbarely visible. What is the thickness of the sheetif the main scale reading is 0.5 mm and the 25thdivision 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

13. A screw gauge with a pitch of 0.5 mm and a circularscale with 50

1.	13. A screw gauge with a pitch of 0.5 mm and a circularscale with 50 divisions is used to measure thethickness of a thin sheet of Aluminium. Beforestarting the measurement, it is found that whenthe two jaws of the screw gauge are brought incontact, the 45th division coincides with the mainscale line and that the zero of the main scale isbarely visible. What is the thickness of the sheetif the main scale reading is 0.5 mm and the 25thdivision 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
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