A positively charged particle is held at the center of a spherical shell. The figure gives the magnitude E of the electric field versus radial distance r. The scale of the vertical axis is set by E,= 13.5 x 107 N/C. Approximately, what is the net charge on the shell? Assume r = 4 cm. E (107 N/C) E 0 Ts 2r, 1 3r, 4r, 5r,

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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.