placed at the center of the circle s are true for this system? acting on +Q is zero. placed perpendicular to the surfa unt and released, it does not con
placed at the center of the circle s are true for this system? acting on +Q is zero. placed perpendicular to the surfa unt and released, it does not con
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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?
1. The force acting on +Q is zero.
II. If +Q is displaced perpendicular to the surface by a
+Q
small amount and released, it does not come back to
the center.
II. The electrostatic potential energy of +Q is
15q0/amega² •
IV. The magnitude of the electric field on +Q is
15qQ
/ameqa² •
II
O Iv
None of them
O Il and III
O 1, II, and IV
O 1, and II
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