[ Physics ] Open Question : [PHYSICS]How to - "Prove that the magnetic field at the centre of a sphere is zero when _____ ?
Prove that the magnetic field at the centre of a sphere is zero when two wires are placed perpendicularly on it surface on two different points and a current is running through it .
How to prove that the induced magnetic field is zero at the centre of the circle
I know how to do it for a ring , but for a sphere ... im not sure.
pls take any variables of your choice...ill understand.
Source: http://answers.yahoo.com/question/index?qid=20120904025924AAY1WRH