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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > Figure shows a cross section of a long cylindrical conductor of radius a containing a long cylindrical hole of radius a containing a long cylindrical hole of radius b. THe central axes of the cylinder and hole are parallel and are distance d apart, current i is uniformly distributed over the tined area. what is the magnitude of the magnetic field at the centre of the hole ?

Figure shows a cross section of a long cylindrical conductor of radius a containing a long cylindrical hole of radius a containing a long cylindrical hole of radius b. THe central axes of the cylinder and hole are parallel and are distance d apart, current i is uniformly distributed over the tined area. what is the magnitude of the magnetic field at the centre of the hole ?

A conducting current-carrying plane is placed in an external uniform magnetic field. As a result the magnetic induction becomes equal to B1 on one side of the plane and B2 on the other side. Find the magnetic force acting per unit area of the plane.