JEE Main 2024 Physics question
The diameter of a sphere is measured using a vernier caliper whose 9 divisions of main scale are equal to 10 divisions of vernier scale. The shortest division on the main scale is equal to 1 mm. The main scale reading is 2 cm and second division of vernier scale coincides with a division on main scale. If mass of the sphere is 8.635 g, the density of the sphere is:
Answer: (D)
Solution
Least count = 1 mm − 0.9 mm = 0.1 mm. Diameter = 20 + 2 × 0.1 = 20.2 mm, so
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