The smallest division on main scale of a vernier callipers is 1 mm and 10 vernier divisions coincide with 9 scale divisions. While measuring the length of a line, the zero mark of the vernier scale lies between 10.2 cm and 10.3 cm and the third division of vernier scale coincide with a main scale division. (a) Determine the least count of the callipers (b) Find the length of the line

The smallest division on main scale of a vernier callipers is 1 mm and

1.	The smallest division on main scale of a vernier callipers is 1 mm and 10 vernier divisions coincide with 9 scale divisions. While measuring the length of a line, the zero mark of the vernier scale lies between 10.2 cm and 10.3 cm and the third division of vernier scale coincide with a main scale division. (a) Determine the least count of the callipers (b) Find the length of the line
Answer» Solution :(a) Least count (L.C) `= ("SMALLEST division on main scale")/("Number of divisions on vernier scale")= (1)/(10)mm= 0.1mm= 0.01cm` (B) Length of the line = `(10.2+ 3 XX 0.01) cm = (10.23)cm`