ADVANCED ELECTRICITY AND MAGNETISM. 



two fine suspending 



Fig. 25. 

 Circular coil of wire suspended in a uniform magnetic field. 



Fig. 26. 



Let A0 be the angle in radians which is subtended by A/; then 

 A/ = r-A0, and equation (2) becomes: 



AT = Z/7/r 2 sin 2 0-A0 (3) 



