Question

how can we record the length by main scale?​

Answer 1

Explanation:

Length recorded = Main scale reading + L.C. × V.S.D. The least count of a vernier callipers is 0.01 cm and it has an error of + 0.07 cm. While measuring the radius of a sphere, the main scale reading is 2.90 cm and the 5th vernier scale division coincides with main scale