THE 

 LONDON, EDINBURGH, and DUBLIN 



PHILOSOPHICAL MAGAZINK 



AND 



JOURNAL OF SCIENCE. 





k 



[FIFTH SERIES.] 



AUGUST 18911. 





XVI. On the Effect of a Solid Conducting Sphere in a 

 Variable Magnetic Field on the Magnetic Induction at a 

 Point outside. By C. S. Whitehead, M.A* 



THIS paper is an investigation of the magnetic induction 

 at a point outside a solid conducting sphere when 

 magnetic disturbances are taking place in the dielectric 

 outside. 



From the equations obtained, it is shown that when the 

 sphere becomes an infinite plate and the inducing system 

 consists of an alternating current in a circular circuit whose 

 plane is parallel to the surface of the plate, we have for a point 

 just outside the plate and on the axis of the circuit, 



67r<y/j,d 



U d= /. /3 \ ±d — v, 



and for a point at a considerable distance from the axis and 

 just outside the plate, 



* Communicaled by the Physical Society: read April 21, 1899. 

 Phil. Mag. S. 5. Vol. 48. No. 291. Aug. 1899 . N 



