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Electric Field due to Infinitely Long Line of Charge #8211; For a uniformly charged wire of an infinite length having a constant linear charge density, i.e. (λ = Charge/Length), electric field at point P at a distance r is given by ∫E ds = Q/ε<sub>0</sub> ⇒ E = λ/2πε<sub>0</sub>r = 2kλ/r [Where, k = 1/4πε<sub>0</sub>]
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