30_ Region 1 (z < 0) contains a dielectric for which ɛr1 = 2.5, while region 2 (z > 0) is characterized b ɛr2 = 1. Let E2 = -30ax + 50ay %3D + 70az V/m, The angle between E1 and the normal to the surface ? A) 23.4 B) 27.5 C) 0 D) None of these

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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.