Quiz
1. Determine the magnetic field due to a very short current element at the origin of the coordinate system. The current element is oriented along the positive x-axis, its current is A, and its length is m. The observation point P is with coordinates m.
2. The magnetic field intensity inside a cylindrical wire with uniformly distributed current density depends on the distance from the center of the wire as
3. At a point P, the static magnetic field is given by
(A/m).
Find the electric current density J(P) (in A/m2) at P.
4. The magnetic vector potential A in a given region of space is given as the gradient of a scalar function:
, where .
Find the magnetic flux density B.
5. The magnetic vector potential is known to be
, Wb/m,
in a uniform nonmagnetic (i.e. ) isotropic region. What is the current density J in this region?