OX TRANSIENT ELECTRIC CURRENTS. 35 3 



an increasing magnetizing force, at first rapidly ; but ultimately 

 the current attains a maximum value. Thereafter ir U-irins to 

 decrease very slowly ;is the magnetizing force is increased. The 

 transient current in weak field is smaller for large than foi 1 moderate 

 twists, hut after reaching the maximum, the rate of decrease becomes 

 slower as the twist is taken greater. The consequence is that the 

 curves for larger twists cut the curves for the smaller in a particular 

 magnetizing held. This is well exemplified in the three curves [If, 

 IV, and V. 



The magnetizing field corresponding to the maximum transient 

 current becomes greater as the amount of twist is increased. The 

 following numbers give the strengths of the magnetizing force cor- 

 responding to the maximum transient current. 



The magnetizing field corresponding to the maximum transient 

 current is however, nearlv twice as great when the field is reversed 

 with constant twist than when the twist is suddenly reversed with 

 constant held. The accompanving figure gives the relation between 

 the magnetizing force corresponding to the maximum transient 



