Question

Q. When zero of main scale coincides with zero of vernier scale, the error is:
A. Positive
B. Negative
C. No error
D. None of these​

Answer 1

Answer :option c

Explanation:When zero of vernier scale lies left to the zero of the main scale then the zero error is negative.Hence the negative error in the instrument is need to be added to in the final reading for appropriate measurement.  

Therefore, option (C) is incorrect.