PHYSICS · Single correct · CBSE · Physics · Units and Measurements · Units and Measurements
Problem
Two quantities are measured as a=2.0±0.1 and b=3.00±0.01. They are multiplied to obtain Q=ab. Which statement about the contribution of a and b to the uncertainty in Q is correct?
(a) b contributes more because its absolute uncertainty is larger.
(b) a contributes more because its percentage (relative) uncertainty is larger.
(c) Both contribute equally because absolute uncertainties are added when quantities are multiplied.
(d) Neither contributes; the product Q is exact due to significant figures.