An isolated very long metallic rod with a uniform circular cross-section of radius 0.55 mm has a constant charge per unit length of 2.25 × 10⁻⁸ C/m. Find the electric field magnitudes at distances (a) 0.25 mm and (b) 0.75 mm, from the longitudinal axis of the rod.

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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.