This gives for the given value of the capacitances,
3
10
500
F
1 7
10
C
3
Q
V
−
=
×
µ
=
×
 and
3
500
10 F
5 0
10
C
Q
V
−
=
×
µ
=
×
′
2 15  ENERGY STORED IN A CAPACITOR
A capacitor, as we have seen above, is a system of two conductors with
charge Q and –Q