The length of the string of a simple pendulum is measured with a meter scale to be `63.5 cm`, the radius of the bob plus the hook is measured with the help of vernier caliper to be `1.55 cm`. Select the incorrect statement.

Options

A. Least count of meter scale is `0.1 cm`
B. Least count of vernier caliper is `0.01 cm`
C. Effective length of pendulum is `65.0 cm`
D. Effective length of pendulum is `65.2 cm`

Answer

D

Explanation

From measurements least count of meter scale is `0.1 cm` and least count of vernier calliper is `0.01 cm`. Effective length of simple pendulum `=63.5 + 1.55 = 65.15 = 65.2 cm`.