Question

The diameter of a sphere having mass 8.635 gm is measured by a vernier scale. 10 divisions of vernier scale coincides with 9 divisions of main scale and one main scale division is 1 mm. The reading of main scale is 2 cm and 2 divisions of vernier coincide with a main scale division, the density of the sphere is

(1) \(2.2 g/cm^3\) 

(2)\(2 g/cm^3\) 

(3) \(2.5 g/cc\) 

(4) \(1.75 g/cm^3\)

Answer 1

Correct Option is (2) 2 g/cm³ 

LC = 0.1 mm 

d = \(2cm+2\times0.1\) mm 

= 20.2 mm 

= 2.02 cm