Question

What is the type of zero error when the vernier scale zero lies towards

(i) right of the main scale zero,

(ii) left of the main scale zero?

Answer 1

1. Positive zero error occurs if zero on the vernier scale lies on right side of zero on the main scale. If the error is positive, correction is negative.
2. A negative zero error occurs if zero on the vernier scale lies on the left side of zero on the main scale. If the error is negative, correction is positive.