302 



Professor J. A, Fleming 



[March 6, 



motive force acting upon it, the current produced in it will always 

 be in arrear of the electromotive force in phase. The current 



Fig. 5. 



Incandescent lamp and coil arranged to exhibit the efifect of the inductance 



of the coil. 



Fig. 6. 



6 



S 



Mechanical model illustrating the " lag " of the current in an inductive circuit. 



induced lags in phase behind the inducing electromotive force. 

 This "lag" of the current behind the impressed harmonically 

 varying electromotive force in consequence of self-induction 



