Physics, 23.03.2020 17:54, nardosem9

A charge of +3.0 mC is distributed uniformly along the circumference of a circle with a radius of 20 cm. How much external energy is required to bring a charge of 25mC from infinity to the center of the circle?

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A charge of +3.0 mC is distributed uniformly along the circumference of a circle with a radius of 20...