Question

Least count of vernier calipers is 0.01 cm. Measuring the length of an object reading of main scale is 2.7 cm and the fifth division of vernier scale coincide with any division of main scale. The length of object will be

• A. 2.75 cm
• B. 3.75 cm
• C. 4.75 cm
• D. 1.75 cm

Hint:

To calculate the length, add the main scale reading to the Vernier scale reading (least count times the division number).

Answer 1

The Correct Option is A

The length of the object is the main scale reading plus the Vernier scale reading. Since the fifth division coincides, the length is: \[ \text{Length} = 2.7 \, \text{cm} + 0.05 \, \text{cm} = 2.75 \, \text{cm} \] Thus, the correct answer is 2.75 cm.