On a thin ring with a radius of 10 cm, a charge of 10 μC is evenly distributed.

On a thin ring with a radius of 10 cm, a charge of 10 μC is evenly distributed. Determine the force acting on a point charge of 1 pC, located at a distance of 10 cm from its center.

Determine the distance from the charge to the ring using the Pythagorean theorem: √ (0.1 ^ 2 + 0.1 ^ 2) = 0.141 m
According to Coulomb’s law, we get: F = 1 / 4πέέ0 * q1 * q2 / r ^ 2 where έ is an electric constant equal to 8.854187817 10 ^ 12.
Then F = 1/4 * 3.14 * 8.854187817 10 ^ 12 * 10 * 10 ^ -6 * 10 ^ -12 / 0.2 = 50 * 10 ^ -28 = 5 * 10 ^ -29.