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 l 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:

(1) 2.5 g/cm³

(2) 1.7 g/cm³

(3) 2.2 g/cm³

(4) 2.0 g/cm³

                                                                          JEE-2024

Solution:                
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 l 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: (1) 2.5 g/cm3 (2) 1.7 g/cm3 (3) 2.2 g/cm3 (4) 2.0 g/cm3 JEE-2024

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