11(c)]
We call m0 the permeability of free space (or vacuum) The Biot-Savart law for the magnetic field has certain similarities, as
well as, differences with the Coulomb’s law for the electrostatic field Some
of these are:
(i)
Both are long range, since both depend inversely on the square of
distance from the source to the point of interest The principle of
superposition applies to both fields