These are not doubts -
I am just looking for simpler ways to solve these :-
1 > Given two plain - parallel electrodes , at a distance " d " , and kept
at voltages " 0 " and " V0 " , find the magnetic field per unit length at a
distance " x " from the lower potential electrode if it is supplied an
unlimited number of electrons at rest . Neglect collisions .
2 > A sphere of radius " r " and conductivity " σ " has a uniform charge
density " Ï " . Find the charge spreading on the sphere as a function of
time " t " . Can the sphere be an equipotential volume ever ? Take the
permittivity of the sphere - " ε " .
3 > A very long co - axial cable consists of an inner cylinder of radius
" a " and electrical conductivity " σ " . The outer shell has infinite
conductivity . The space between the cylinders is empty . A uiform
constant current density " j " , directed along the axial co - ordinate
" z " , is maintained in the inner cylinder . Return current flows uniformly
in the outer shell . Compute the surface charge density on the inner
cylinder as a function of the axial co - ordinate " z " , with the origin
" z = 0 " chosen to be on the plane half - way between the ends of
the cable .
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UP 0 DOWN 0 0 0
