- #1

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- Homework Statement
- I want to find out the force that eddy currents apply on a magnet that is moving though a copper coil. I have not been able to find out how this works, although I know hoe to find the magnitude of the induced current occurring from the change in magnetic flux using Faraday's Law.

- Relevant Equations
- Emf = -N dΦB/dt

This is Faradays Law I used to find the induced EMF.

How can I find out its effect on the magnet itself?

I have jus thought about how maybe I could sue the magnetic field strength equation for a solenoid (that I used to find the Emf in the first place) again, to find the magnetic field strength arising from the induced current:

B= μNI / L

where μ is the permativity of free space

N= Number of turns in the coil

L = length of the coil

Here I could just plug in the newly found Current using the calculations from before when I found the EMF and then plugged it into the equation I=V/R. Would this work? And if so, how does this even tell me what the force acting on the magnet is? Is there any way to calculate this?

B= μNI / L

where μ is the permativity of free space

N= Number of turns in the coil

L = length of the coil

Here I could just plug in the newly found Current using the calculations from before when I found the EMF and then plugged it into the equation I=V/R. Would this work? And if so, how does this even tell me what the force acting on the magnet is? Is there any way to calculate this?