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A thin rod of length l and uniform charge per unit length λ lies along the...

A thin rod of length l and uniform charge per unit length λ lies along the x axis as shown figure. (a) Show that the electric field at point P, a distance y from the rod, along the perpendicular bisector has no x component and is given by E=(2kλsinθ0)/y. (b) Using your result to (a), show that the field of a rod of infinite length is given by E=2kλ/y.

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