Question

a positively charged rod is brought near a face of initially neutral metal ball, the other face of the ball is connecting to the earth by wire . After cutting the wire connecting the ball to the earth , what will be the interaction between the rod and the metal ball?

A. they attract each other .

b. not enough information .

c. they repel each other .

d. there is no interaction between them

Answer 1

When we bring the positively charged rod to a neutral metal ball. Due to induction the metal ball will attain negative charge on the front side of the metal ball and positive charge on the back side of the metal ball. As wire is connected to the ground. Whole positive charge will flow down to ground leaving only negative charge. And we know that opposite charges attract each other so they will attracted towards each other.

Hence option A is the correct answer.

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