Faradays law tells us that a change in flux induces an emf. Now consider the phenomenon of motional emf. It is observed across the ends of an open conductor (ie one which is not in a circuit). It is always discussed in connection to faradays law. Where is the change in flux in the case of a straight conductor moving perpendicular to a uniform magnetic field? Also, is the converse of faradays law true? That is, is an induced emf ALWAYS produced by a change in magnetic flux?