Consider a (two-dimensional) ring of positive charge, uniformly distributed. The force on a charge Q placed at a point P located precisely at the geometric center of the ring
A) "repels" (or "attracts") Q from (or to) P along an axial line depending on the sign of Q.
B) "repels" Q from P along a line in the plane of the ring.
C) "attracts" Q to P along a line in the plane of the ring.
D) is precisely zero.
Correct Answer:
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