PHYSICS · Single correct · A Level · Physics · Measurements and their errors · Measurements and their errors
Problem
A steel rod has a length close to 2.50 m. The experimenter wants the percentage uncertainty in its measurement to be at most 0.20 %. What is the maximum permissible least count of the measuring instrument?
(a) 10 mm
(b) 5 mm
(c) 0.5 mm
(d) 2 mm