Two identical spheres have the same amount of charge, the charge on sphere A is

Question

Two identical spheres have the same amount of charge, the charge on sphere A is positive and the charge on sphere B is also positive. The two spheres are placed on a smooth, level, frictionless table whose top is an insulator. Which of the following is true?

a. They will move apart with a decreasing acceleration.

b. They will move apart with an increasing acceleration.

c. They will move apart with constant acceleration.

d. Since the force on A is equal but opposite to the force on B, they will not move.

Explanation / Answer

Since both the spheres are identical and have same amount of charge. Both will exert equal forces in opposite direction. Force=mass x accleration, since force and mass are equal in magnitude. Their respective acceleration will be same. And as they both are positive they will repel each other and will move apart. Hence option (C) is correct.

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