Two tiny beads are 25 cm apart with no other charges or fields present.Bead A carries 10 µC of charge and bead B carries 1 µC.Which one of the following statements is true about the magnitudes of the electric forces on these beads?
A)The force on A is 10 times the force on B.
B)The force on B is 10 times the force on A.
C)The force on A is exactly equal to the force on B.
D)The force on A is 100 times the force on B.
E)The force on B is 100 times the force on A.

Question

Quizplus · Accepted Answer

According to Coulomb's law, the magnitude of the electric force between two point charges is directly proportional to the product of the magnitudes of the charges and inversely proportional to the square of the distance between them. Since the force depends on the product of both charges, the forces exerted on each bead by the other are equal in magnitude but opposite in direction, regardless of the difference in their charge magnitudes.

Two Tiny Beads Are 25 Cm Apart with No Other