Eddy current experimental instrument of through hole type spherical magnet

An eddy current experimental instrument of a through-hole type spherical magnet mainly comprises a through-hole type spherical magnet a, a through-hole type spherical non-magnet b, two same transparent conductor tubes, a vertical support and a horizontal table top, and is characterized in that the through-hole type spherical magnet a is a sphere made of a hard magnetic material, and through holes passing through the sphere center are formed in the surface of the sphere at equal intervals in a sintering manner; then the lead block is implanted into one hole to be fixed, and magnetizing is conducted on the magnetizing device in the direction that the lead block passes through the ball center; the transparent conductor tube is a columnar aluminum tube or a columnar copper tube, and smooth through holes are formed in the side wall of the columnar aluminum tube or the columnar copper tube at equal intervals; the through hole type spherical magnet a and the through hole type spherical non-magnet b are equal in size