List–I		List–II
a)	Two like charges are brought nearer	e)	the force between them decreases
b)	Two unlike charges are brought nearer	f)	potential energy of the system increases
c)	When a third charge of some nature is placed equidistant from two like charges	g)	mutual forces are not affected
d)	When a dielectric medium is introduced between two charges	h)	potential energy of the system decreases

	a	b	c	d
1	h	f	g	e
2	f	h	f	e
3	h	f	e	g
4	g	e	f	h

When two like charges are brought nearer potential energy of the system increases.

When two unlike charges are brought nearer potential energy of the system decreases.

When a third charge of some nature is placed equidistant from two like charges the force of interaction between the charges will remain unchanged but the potential energy of the system increases.

When a dielectric medium is introduced between two charges the force between them decreases.