The diameter of a cylinder is measured using a vernier calipers with no zero error. It is found that the…

 The diameter of a cylinder is measured using a vernier calipers with no zero error. It is found that the zero of the vernier scale lies between 5.10 cm and 5.15 cm of the main scale. The vernier scale has 50  divisions equivalent to 2.45 cm. The 24th division of the vernier scale exactly coincides with one of the main scale divisions. The diameter of the cylinder is, 
  1. 5.112 cm
  2. 5.124 cm
  3. 5.136 cm 
  4. 5.148 cm

Solution

1 MSD = 0.05 ​
1 VSD = 2.45 5 0 = 0.04
Diameter of the cylinder  
= MSR + L.C. × 2 4
= 5.124 cm

Asked in: JEE Advanced 2013 (Paper 1)

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