Consider two vectors, A and B; we can define a new vector C by
C = A x B
Rotate the first vector ( A ) into the second vector ( B ) with the fingers of your right hand. Your thumb then gives the direction of the cross product, A x B.
Remember C is perpendicular to both A and B.
The magnitude of C is given by
(c) Doug Davis, 2003; all rights reserved
Return to Ch 20, Magnetism