A screw gauge is said to have a negative zero error
PHYSICS · Single correct · CBSE · Physics · Units and Measurements · Units and Measurements
Problem
A screw gauge is said to have a negative zero error
(1) when the circular-scale zero coincides with the baseline of the main scale
(2) when the circular-scale zero is above the baseline of the main scale
(3) when the circular-scale zero is below the baseline of the main scale
(4) None of the above