Permanent magnet like magnetic pole attracting each other test instrument
Title：
Permanent magnet like magnetic pole attracting each other test instrument
Application Number：
 200410101825
Application Date：
 2004/12/24
Announcement Date：
 2005/08/03
Pub. Date：
 2007/03/14
Publication Number：
 1648964
Announcement Number：
 1305012
Grant Date：
 2007-3-14
Granted Pub. Date：
 2007-3-14
ApplicationType：
 Invention
State/Country：
 11[China|beijing]
IPC：
 G09B 23/18
Applicant(s)：
 Tsinghua Univ.
Inventor(s)：
 Lu Junling, Yan Sixian, Xia Zhongdong
Key Words：
 Permanent magnet, like magnetic pole, attracting, test instrument
Abstract：
 The test instrument for experiment of like pole in permanent magnet to attract each other as one physical teaching instrument consists of fixed magnet column, fixing rod, pedestal and movable magnet column. Of the fixed magnet column and the movable magnet column, one has strong magnetic field and the other has weak magnetic field; and both of them are made of ferromagnetic material column, permanent magnet and soft iron column tip adhered together. Two magnetic fields with opposite directions have their zero composed magnetic field point in soft iron column. The present invention has smart and simple structure and good experiment effect.
Claim：
Priority：
PCT：
LegalStatus：

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