2 Retarded Potentials of a Magnetic Dipole MomentConsider a loop wire of radius a. At t = 0, a constant current I is suddenlyturned on. For any point under consideration, r > a.So, t<0,I(t) =I, t20.(2)a. Determine the vector potential A(r, 0)!b. Determine the electric field E(r,0)!c. Determine the magnetic field B(r, 0)!Figure 1: Magnetic dipole moment

a. I(t)= 0, t<0I, t⩾0dipole moment m→= I.Az^=Iπa2z^ , t⩾0Retarded vector potential isA→=…

2 Retarded Potentials of a Magnetic Dipole Moment Consider a loop wire of radius a. At t 0, a constant current I is suddenly turned on. For any point under consideration, r > a. (0, t<0, I(t) = |1. t20. (2) a. Determine the vector potential Ã(r, 0)! b. Determine the electric field Ē(r, 0)! c. Determine the magnetic field B(r, 0)! Figure 1: Magnetic dipole moment

2 Retarded Potentials of a Magnetic Dipole Moment Consider a loop wire of radius a. At t 0, a constant current I is suddenly turned on. For any point under consideration, r > a. (0, t<0, I(t) = |1. t20. (2) a. Determine the vector potential Ã(r, 0)! b. Determine the electric field Ē(r, 0)! c. Determine the magnetic field B(r, 0)! Figure 1: Magnetic dipole moment