Two plastic balls suspended by strings are placed close to each other. if they have the same charge, how will they interact with each other?

a) they will repel each other.
b) they will attract each other.
c) they will not interact.
d) they will move in circles.

Option (a) is the correct answer.

Explanation:

It is known that when two objects which have opposite or unlike charges come in contact with each other then they tend to attract each other.

Whereas when two objects which have same or like charges come in contact with each other then they tend to repel each other.

Therefore, we can conclude that when two plastic balls suspended by strings are placed close to each other and they have same charge then  they will repel each other.

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