User:Ngocthuan 06

In the case (1), we use one ion bar which is applied to the magnet bar with the thickness of about 5mm ( In the figure , I draw the magnet and the ion , they are separately for seeing easily, in fact, an ion is attracted by a magnet.) In the case (2), we use one ion bar which is applied to the magnet bar with the thickness of about 1mm . I think that : At the point of Z, (in the both cases) the magnetic field is the same strength. And at the point Y ( in the case (1) , by causing of the relutance effect , and the thickness of the ion bar is thicker , the magnetic field shall be weeker than the point Y of the case (2) . A man talk me that he can make the magnetic field of this magnet shall be stronger or weeker by placing one ion bar with the adjustable thickness . I.e. that he want to talk at the point of Z .