Question: A long, straight line charge with charge per unit length extends along the z -axis from a to .Another line charge with -

A long, straight line charge with charge λ per unit length extends along the z -axis from a to ∞ .Another line charge with -λ per unit length is placed along the -z -axis from -a to -∞.

(a) By direct integration determine the electrical potential in cylindrical coordinates.

(b) Find the r component of the electric field

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