Grade 12th passGeneral Physics
In a vernier calliper main scale and vernier scale are made up of different materials when the room temperature increases by∆t℃,it is found that reading of the instrument remains the same .earlier it was observed that the front edge of the wooden rod place for measurement crossed the N ^th M.S.D and (N+2) M.S.D coincided with the second vernier scale division .initially 10 V.S.D coincided with 9 M.S.D. if coefficient of main scale is a and b is of vernier scale ,then (a/b)=
