explain why right and why wrong One of the following is not

explain why right and why wrong

One of the following is not a source of magneto static fields: (explain your choice) A dc current in a wire of length L_0 A permanent magnet made out of ferromagnetic with mu =1001 A charge moving with acceleration An electric field changing linearly with time A charged disk rotating with constant angular velocity

E) charge disc rotating with constant angular velocity is not a source of magnetostatic field