Jee Main
Units And Measurements
JEE Main 2022 (Online) 26th July Morning Shift
MCQ+4 / -12022
A screw gauge of pitch \(0.5 \mathrm{~mm}\) is used to measure the diameter of uniform wire of length \(6.8 \mathrm{~cm}\), the main scale reading is \(1.5 \mathrm{~mm}\) and circular scale reading is 7 . The calculated curved surface area of wire to appropriate significant figures is :
[Screw gauge has 50 divisions on its circular scale]