JEE Main 2014Session, Shift 1PhysicsEasyUnits and Measurements122× since 2002A student measured the length of a rod and wrote it as 3.50 cm. Which instrument did he use to measure it?AOption A. A screw gauge having 100 divisions in the circular scale and pitch as 1 mm.BOption B. A screw gauge having 50 divisions in the circular scale and pitch as 1 mm.COption C. A meter scale.DOption D. A vernier calliper where the 10 divisions in vernier scale matches with 9 division in main scale and main scale has 10 divisions in 1 cm.CheckSkip · show solution
