# Magnetic charges to solve interaction between 2 magnetic dipoles

Suppose we have an electric dipole of charge Q+ and Q-.The charges of the dipole are fixed (they cant move closer to each other than they already are).If we place a test particle at some distance r from the electric dipole it is pretty straight forward we calculate the electric force between each of the charges of the dipole with the test particle.My question is:A magnet is a magnetic dipole , magnetic monopoles don't exist in nature.Can we define magnetic charges in order to solve interactions between 2 magnets?

## 1 answer

Using imaginary magnetic charges (usually called *magnetic monopoles*) to solve for forces between two magnets doesn't make sense. Even if magnetic monopoles existed, what exactly do you envision doing with them to solve for the force between two magnets?

Each magnet contributes to the magnetic field. Just like your dipole electric charge causes an electric field, a magnetic dipole causes a magnetic field. You can calculate what the force would be on a point charge anywhere in these fields, whether electric or magnetic.

So in summary, solve for the field. Then you can determine what forces any charges in that field would experience. No monopoles need to be abused in the process.

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