Question

While measuring the length of the rod by vernier callipers, the reading on the main scale is 6.4 cm and the eight divisions on vernier is in line with marking on the main scale division. If the least count of callipers is 0.01 and zero error - 0.04 cm, the length of the rod is ______.

Options

• 6.52 cm

• 6.48 cm

• 6.44 cm

• 6.4 cm

Answer 1

While measuring the length of the rod by vernier callipers, the reading on the main scale is 6.4 cm and the eight divisions on vernier is in line with marking on the main scale division. If the least count of callipers is 0.01 and zero error - 0.04 cm, the length of the rod is 6.52 cm.

Explanation:

Final reading of the length of rod

= MSR + VSR - Zero error

= 6.4 + (coinciding × L.C.) - (- 0.04)

= 6.4 + (8 × 0.01) + 0.04

= 6.52 cm