when left switch S is closed and the right switch opened the capacitor is chartered to its maximum value
when the right switch is closed and left switch opened the capacitor starts discharging
as electronic current starts flowing, the self induced emf in the coil opposes the current flow, hence rate of discharge of electrons is somewhat slowed down.
due to the flow of current magnetic field is set up which stores the energy given out by the electric field.
electron current will actually reduce to zero so that both plates are reduce to the same potential.At that time,there is no electric field but the magnetic field has maximum value
however due to the electrical inertia of the coil more electrons are transferred to the upper plate than are necessary to make up the electron deficiency there. it means that now plate upper plate of the capacitor has more electrons than the lower one. Hence, capacitor becomes charged again though in the opposite direction
Magnetic field of the inductor collapses and the energy given out by it is stored in the electric field of the capacitor
After this, the capacitor starts discharging in the opposite direction so that now the electrons move to the lower plate. The electric field starts collapsing where as the magnetic field starts building up again in the opposite direction
However, this discharging electrons overshoot Andaman an excess amount of electrons flow to the lower plate thereby charging the capacitor once more.
This sequence of charging and discharging continues. The to and fro motion of electrons between the two plates constitutes an Oscillatory current
