Infinite uniform line charges of 5 nC/m lie along the (positive and negative) x and y axes in free space. Using the expression of E field that is obtained using Gauss’s law, determine the electric field intensity at the following observation points: (a) PA(0, 0, 4); (b) PB(0, 3, 4). [Ans. (a) 45 az V/m; (b) 10.8 ay + 36.9 az V/m.]

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Electric field

A physical field present around an electrically charged particle that exerts a force on all other charged particles is called an electric field. The charged particles present in the field either repel or attract. From electric charges or time-varying magnetic fields, the electric field originates. One of the manifestations of electromagnetic force which is one of the four fundamental forces present in nature are the electric fields and magnetic fields.