The Demonstrative Experiment Research on Magnetic Properties of Nano-magnetic Fluid

In this paper,based on the visual property of magnetic field in nano-magnetic fluid under the external magnetic field,the demonstrative experiment apparatus about the magnetic property of nano-magnetic fluid was built up.This apparatus can present the shape and moving changes of nano-magnetic fluid in the conical spiral tower.The magnetic changes around the conical spiral tower result from the variation of magnetic strength around the tower.Also,the changes reflect the general magnetic field distribution around the tower.From the point of physic,these changes are analyzed qualitatively.This demonstrative experiment can stimulate learning interest of students on interrelated knowledge thoroughly,while it is important to improve students' passion of studying relevant science and technology knowledge.