Since we know the work done by a magnetic field is zero.now how does the magnetic field changes the kinetic energy of rod when it applies force BIL (where I is current at any instant)
moreover if we apply if we apply some external force which balances the magnetic force the work done by both force will be 0(their sum) ,however we know induced current flows in circuit due to motional emf of rod and energy is lost through resistance where does this energy come from?(since no work is done)