# Magnetic monopole

I need to find out at what distance creates a magnetic monopole the same magnetic field as an electron with Bohr's magnetron magnetic momentum.

I don't know how to calculate the field of a monopole. I know what an electric charge is; but a monopole? As a clue I've been given Dirac's condition between e charge and the "monopole" magnitude.

lightgrav
Homework Helper
I expect you're supposed to find the distance BETWEEN two monopoles
(ie, making a dipole) that essentially re-creates the field of an electron.

The field strength of a single monopole decreases as 1/r^2,
while the field of an actual electron decreases as 1/r^3 (like a dipole).

Im not quite sure what your question is, but if this is the correct interpretation:

"at what distance will a magnetic monopole create the same magnetic field as an electron with Bohr's magnetron magnetic momentum?"

In magnetostatics if there was a magnetic monopole, the field would be:

B = (m0/4pi)*(qm/r^2)er

I worry for you because I have done a problem where I was supposed to calculate the angular momentum stored in the 2 fields caused by an electric charge and magnetic monopole seperated by a distance D, and the answer was quite shocking.

dextercioby