A very long conducting cylinder of radius \(\mathrm{R}\) earries a uniform surface charge with a constant surface charge density of \(\sigma\).
a) Find electric field everywhere created by this cylinder.
b) Find the potential difference between a point \(2 R\) away from the central axis of the cylinder and the surface of the cylinder \((\Delta V=V(r=2 R)-V(r=R)=?)\)
c) Find the work done by \(\vec{E}\) - field on a point charge \(q_{0}\) if this point charge moves from the surface of the cylinder to a point \(2 R\) away from the central axis of the cylinder.
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