Question

The length of a cylinder is measured with verniercallipers whose smallest division on main scale is 0.5 mm and 10 vernier divisions is equal to 9 main scale divisions. It is observed that 80^th division of the main scale coincides with the 4^th division of the vernier scale, the length is –

• A. 4.05 cm
• B. 3.63 cm
• C. 4.10 cm
• D. 3.82 cm

Answer 1

Answer: (D)

3.82 cm

Answer 2

Least count = 0.05 mm

Main scale reading = 76 × 0.5 = 38 mm

Vernier scale reading = 4 × 0.05 = 0.2 mm

length = 38.2 mm = 3.82 cm