Showing the interaction between magnetism and electricity is going to be much easier with a tool like this Electromagnetic Force Demonstrator. It has an aluminum pipe that travels along the track in the direction the current is applied. The metal rails are fixed to a magnet with its magnetic field directed upward.
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This is a neat little gadget to explain Current, Magnetic Fields, and Lorentz Force to your students. You can get yours for under $30 at this time.
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