Question

Current density of an electron in a magnetic field, using landau

Answer 1

In electromagnetism, current density is the amount of charge per unit time that flows through a unit area of a chosen cross section.[1] The current density vector is defined as a vector whose magnitude is the electric current per cross-sectional area at a given point in space, its direction being that of the motion of the charges at this point

Answer 2

Answer:

it is the amount of charge per unit time......