Question

Find the zero error in the figure given.

• A. -0.4 mm
• B. 0.4 mm
• C. 0.6 mm
• D. 0.6 m

Answer 1

The correct option is A -0.4 mm

Since, the zero of vernier scale is behind the zero of main scale. So the error is negative zero error.

Least count of the vernier calliper $L.C.=0.1mm$

Since the $6th$ division matches with the main scale division.

Zero error $=-(10-n)\times L.C.=-(10-6)\times 0.1=-0.4mm$