Question

When both jaws touch each other, zero mark of vernier scale is left to zero mark of main scale. Further 5th mark of vernier scale coincides with a certain mark of main scale. Find zero eror of vernier caliper.

• A. $-0.1mm$
• B. $+0.5mm$
• C. $-0.5mm$
• D. $\pm 0.5mm$

Answer 1

The correct option is B $+0.5mm$

Zero error =$zero$ $reading=$ $5^{th}mark$$=5\times L.C.=5\times 0.1mm=0.5mm$

Option B is correct.