The separation between the plates of a charged parallel- plate capacitor is increased. Which of the following quantities will change ?
(a) charge on the capacitor
(b) potential difference across the capacitor
(c) energy of the capacitor
(d) energy density between the plates
Choose the correct option
1. (a) , (b)
2. (b) , (c)
3. (c) only
4. (a) , (d)