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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

Text Solution

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(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`
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Knowledge Check

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