Consider the following cylindrically symmetric potentials:
?(?,?)= 0 ?(?,?) = −?0t/2piE0? a Find the corresponding electric
and magnetic fields ??,? and ??,?.
b. Find the scalar gauge function ?(?,?) that transforms these
potentials to a more familiar form where only the scalar potential
is non-zero. Note that this ? is not the same as the ?! that shows
up in the potentials.
Electric field in terms of potentials is
The given potentials are
Hence,
Magnetic field in terms of potential is
The expression of curl in cylindrical coordinates is
From equation (3) we can see that and is only a function of , therefore
Under a gauge transformation the potentials transform as
We want
Therefore
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