In a simple picture of the hydrogen atom, the electron moves in circular orbits around the central proton attracted by the Coulomb force. The lowest (n= 1) energy orbit that is allowed for the electron is at a radius of 5.29 x 10-11m and the second (n= 2) lowest allowed orbit is at 4 times this radius. Calculate the magnetic field strength at the proton due to the orbital motion of the electron in then= 2 state