An electric current of is regarded as a scalar quantity
PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
An electric current of 2A is regarded as a scalar quantity. Which explanation justifies this classification?
(a) Because its magnitude is always positive.
(b) Because its SI unit, ampere, is defined without reference to direction.
(c) Because it is defined only by its magnitude and does not obey the rules of vector addition.
(d) Because current is the rate of flow of charge and all rate quantities are scalars.