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15 positive charges of q are di the circumference of a circle v charge of +Q is placed at the c of the followings are true for

15 positive charges of q are di the circumference of a circle v charge of +Q is placed at the c of the followings are true for

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15 positive charges of q are distributed uniformly over the circumference of a circle with radius a. Then another charge of +Q is placed at the center of the circle. Which of the followings are true for this system? I. +Q The force acting on +Q is zero. If +Q is displaced perpendicular to the surface by a small amount and released, it does not come back to the center. III. The electrostatic potential energy of +Q is 159Q IV. The magnitude of the electric field on +Q is 159Q /¼n€qa² •
Transcribed Image Text:15 positive charges of q are distributed uniformly over the circumference of a circle with radius a. Then another charge of +Q is placed at the center of the circle. Which of the followings are true for this system? I. +Q The force acting on +Q is zero. If +Q is displaced perpendicular to the surface by a small amount and released, it does not come back to the center. III. The electrostatic potential energy of +Q is 159Q IV. The magnitude of the electric field on +Q is 159Q /¼n€qa² •
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