3B Scientific Permanent Magnet with Adjustable Pole Spacing particularly suited in combination a Lorentz motor to demonstrate the force

for Lorenz force demonstration 3B Scientific's Lorenz motor (P1002662) is required high field permanent magnet with adjustable pole spacing field strength at center of gap 20 mT - 1000 mT horizontally or vertically installation of the magnet system material of magnet elements neodymium