- #1
trix312
- 7
- 0
something that has had me confused:
How can I calculate the time varying magnetic field produced by a solenoid, outside the solenoid along the axis of the core. I know that:
inside the solenoid : apply amperes law
For DC (magnetostatic) case outside the solenoid : apply Biot-savart law
but what about a AC (time varying field) outside the solenoid? is the attenuation calculated like in EM waves attenuation and skin-depth? I also read something about replacing biot-savart with Jefimenko's equations if magnetostatics does not apply. Or is this not possible to calculate analytically.
What is going on?
How can I calculate the time varying magnetic field produced by a solenoid, outside the solenoid along the axis of the core. I know that:
inside the solenoid : apply amperes law
For DC (magnetostatic) case outside the solenoid : apply Biot-savart law
but what about a AC (time varying field) outside the solenoid? is the attenuation calculated like in EM waves attenuation and skin-depth? I also read something about replacing biot-savart with Jefimenko's equations if magnetostatics does not apply. Or is this not possible to calculate analytically.
What is going on?