Question

A vernier having a positive zero error of +5 is used to measure the side of a 2 cm cube. The length as measure by the vernier will be : (use L.C $=$ 0.01 cm)

• A. 1.95 cm
• B. 2 cm
• C. 2.05 cm
• D. Cannot say

Answer 1

The correct option is C 2.05 cm

Correction $=-0.505cm(-5\times 0.01cm)$
Corrected reading $=$ Observed reading + correction
2 $=$ Observed reading + (-0.05) cm.
Observed reading $=$ 2.05 cm