The energy of a charged capacitor is given by the expression ($q$= charge on the conductor and $C$ = its capacity)
$\frac{{{q^2}}}{{2C}}$
$\frac{{{q^2}}}{C}$
$2qC$
$\frac{q}{{2{C^2}}}$
A $12 \;pF$ capacitor is connected to a $50 \;V$ battery. How much electrostatic energy is stored in the capacitor?
$27$ similar drops of mercury are maintained at $10 \,V$ each. All these spherical drops combine into a single big drop. The potential energy of the bigger drop is ....... times that of a smaller drop.
Write three different formulas of energy stored in capacitor.
Two positively charged particles $X$ and $Y$ are initially far away from each other and at rest. $X$ begins to move towards $Y$ with some initial velocity. The total momentum and energy of the system are $p$ and $E$.
A $5.0\, \mu F$ capacitor is charged to a potential difference $800\, V$ and discharged through a conductor. The energy(in $J$) given to a conductor during the discharge is