Question

Two like charges are separated by some distance. Describe quantitatively what will happen to the force exerted by one charge on the other if one of the charges is replaced by a charge of the same magnitude but opposite sign. The force will become:

		the same magnitude but becomes attracting.
		not enough information to tell what will happen.
		twice as large.
		the same - no change at all.
		the same magnitude but becomes repelling.

Answer 1

in the first case as there are like charges, so they will repel each other.

but in the next case when one charge is replaced by the opposite charge then the force become attractive and the magnitude will remain the same. because charge are the same only the main difference is opposite polarity.

so the answer is option an i.e the same magnitude but becomes attracting.