Question

When the zero mark on the vernier scale lies towards the right side of the zero mark of the main scale, when the jaws are in contact, then what will be the zero error ? 

(A) zero correction in positive 

(B) zero correction is negative 

(C) zero error in positive 

(D) zero error does not exist

Answer 1

The correct option is (A) zero correction in positive.

Explanation:

Zero mark of vernier is to the right of zero mark of main scale implies zero error is negative and hence zero correction is positive.