You are given an isolated metal rod of length 3L that carries a uniform charge density ?. Someone is interested in a point ? that is a distance L away from the rod, equidistant from both ends 1) What is the integral you would need to solve to find the total electric field at point P? Answer in terms of ?, ? and ? 2) What is the integral you would need to solve to find the total electric potential at point P? Answer in terms of ?, ? and ? 3) If you connect the bar up to a battery so that a current I now flows through it, what would be an expression for the magnetic field at point P, in terms of ?, ?, ?0

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Electric Charges and Fields

One of the fundamental properties is the electromagnetic property. Charge cannot be destroyed by any process and this contributes formally to the law of charge conservation.