What is the electric potential energy of a charge that experiences a force of 3.6 × 10–4 N when it is 9.8 × 10–5 m from the source of the electric field?

For two point charges, electric potential energy is related to the force at separation r by U = Fr. Using the given values, U = (3.6 × 10⁻⁴ N)(9.8 × 10⁻⁵ m) = 3.528 × 10⁻⁸ J, which rounds to 3.5 × 10⁻⁸ J. Therefore, the correct choice is A, 3.5 × 10⁻⁸ J.

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