A $$12 \mathrm{~pF}$$ capacitor is connected to a $$50 \mathrm{~V}$$ battery, the electrostatic energy stored in the capacitor in $$\mathrm{nJ}$$ is

The capacitance of a capacitor with charge $$q$$ and a potential difference $$V$$ depends on

The steady state current in the circuit shown below is :

In the following circuit, the equivalent capacitance between terminal A and terminal B is :