Physics
Grade-9
Easy

Question

At the mid-point between two equal but opposite charges.

  1. Potential energy > 0
  2. Potential  energy < 0
  3. Potential energy =0
  4. Cannot be determined

hintHint:

PE=Kq1q2/r

The correct answer is: Potential energy =0


    • Given that the charges have equal magnitude and the distance from each of them to the mid point is the same and the signs are opposite.
    • Then the magnitude of the potential energy contributed by each of the charges is same, but the signs are opposite.
    • Therefore, the net potential energy should be zero(PE=0).
    • So, the correct option is c.

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