Determine resistance of a generator

[Ry122]

What formula can I use to determine the resistance of an electrical generator?

 

[Ry122]

by resistance i mean the force from the magnets that is slowing down the rotation of the coils.

 

[Ry122]

since no one has replied i guess its safe to assume its not possible to calculate.

 

[Hootenanny]

It is most definitely possible to calculate the force, it is a simple application of the the Lorentz force.

Perhaps no one replied because you don't seem to have put any effort into trying to figure it out yourself.

 

[Ry122]

http://users.on.net/~rohanlal/58c2b8b14b73d2bafeaaafb80b4a5491.jpg
This is the Lorentz formula. It requires me to know the electric field,the particle velocity, magnetic field and the electic charge. I know none of these values.
All I know is how many rpm are required for a certain voltage to be generated.
Is it possible to calculate the force generated with just this information?

 

[Hootenanny]

You would also know, or could work out the current, which is the rate of flow of charge.

 

[Ry122]

With that would I be able to determine the other required values?

 

[Hootenanny]

With that would I be able to determine the other required values?

http://www.physclips.unsw.edu.au/jw/electricmotors.html#mandg" is a good reference from the UNSW.

 

[Ry122]

It isn't a homemade generator so i don't know the number of windings in the coil or the area of the coil.