J
Jan Panteltje
- Jan 1, 1970
- 0
The reason why 2 x more turns gives 2 x lower frequency is simple.
Remember in a LC tuned circuit the electrons run from one side
of the capacitor via the coil to the other side.
When all have arrived, they start their way back.
So to get to the other end, if they have to take 2 x more turns,
the operation will take twice as long.
If the turns are closer together, they get affected by the ones in the
turn next to them, and slow down even more, so it takes longer.
Also turns closer together adds some parallel capacitance.
So we should always think in terms of pendulum, in a LC circuit.
Every time the electrons travel through the coil, they lose a little
energy, and the oscillation is damped, will finally stop.
Howe much they lose depends on the resistance of the coil, and,
if there is a core, on the losses in the core, as energy is transferred
to the core via the magnetic field caused by the motion
of the electrons.
Remember in a LC tuned circuit the electrons run from one side
of the capacitor via the coil to the other side.
When all have arrived, they start their way back.
So to get to the other end, if they have to take 2 x more turns,
the operation will take twice as long.
If the turns are closer together, they get affected by the ones in the
turn next to them, and slow down even more, so it takes longer.
Also turns closer together adds some parallel capacitance.
So we should always think in terms of pendulum, in a LC circuit.
Every time the electrons travel through the coil, they lose a little
energy, and the oscillation is damped, will finally stop.
Howe much they lose depends on the resistance of the coil, and,
if there is a core, on the losses in the core, as energy is transferred
to the core via the magnetic field caused by the motion
of the electrons.
