A
system will be able to make oscilations if the internal
energy can be stored in two (or more) different forms.
An oscilation will take place as the energy changes from
one form to another.
In case of the pendulum will the Energy be stored as
potential energy (m*g*h) in the
outhermost positions (where the mass gain most height
from the point of equilibrium = lowest point)
As the mass accelerates will the potential energy change
form to kinematic energy (½*m*v2)
If theres no energy lost during the oscilations will it
swing forever. However will friction from the
surrounding air course energy to be lost, and the
oscilation will die out gradualy.
When the switch in upper right
corner closed will energy be stored in the coil as
magnetic energy.
There will run an electric current through the winding
and the magnetic field will depend on this current.
When the switch is opened agin will the current be
forced to run through the resistor and the Capacitor.
The Capacitor will recieve and store energy from the
coil in form of electric energy.
When finally the current become zero will all energy
(exept the percentage which was lost in the resistor)
be stored as electric energy.
Now the coil acts as a short-circuit of the capacitor
and a current in the oppersite direction will begin to
build up and increase until the voltage across the
capacitor become zero.
The will go on "forever" until all energy lost in the
resistor.
