Two small positively charged spheres have a combined charge of 7.0 x 10-5 C. If each sphere is repelled from the other by an electrostatic force of 2.0 N when the spheres are 2.0 m apart, what is the charge on each sphere? At the three consecutive corners of a square, 10 cm on each side, are point charges 4×10^ -6 C,8×10^ -6 C, and 12×10^ -6 C, respectively. Find the Ep at the fourth corner of the square.

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Electric Charges and Fields

One of the fundamental properties is the electromagnetic property. Charge cannot be destroyed by any process and this contributes formally to the law of charge conservation.