Lets say if we have an induction motor or any motor whose rotating shaft acts as a source of alternating emf to another motor and rotating shaft of this motor again acts as a source of alternating emf to third motor and so on... We connect such a finite number of motors and we call it as a single "machine". At each step there will be some losses which will get added up at end and after finite number of such motors all the INPUT ENERGY will be converted into LOSS. The efficiency of such a machine will be zero. Is this possible?? I mean can there be a situation of zero efficiency ?? And if all the energy loss is dissipated as heat then ALL the electrical energy is converted to heat. Is this thermodynamically stable machine???