Q2 of 44 Page 20

The main scale reading while measuring the thickness of a rubber ball using Vernier caliper is 7 cm and the Vernier scale coincidence is 6. Find the radius of the ball.

Here, thickness of the rubber ball = diameter of the ball.

Main scale reading = 7 cm


Vernier scale reading = 6


Least count = 0.01 cm


Assuming, there is no zero error


Diameter of the ball =


Main scale reading (MSR) +


(Vernier scale coincidence (VC) × least count (LC)) ± ZE


= 7 + (6 × 0.01) ± 0


= 7.06 cm


Radius of ball


= 3.53 cm


Hence, radius of the ball is 3.53 cm.


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