☆To observe deflection of electron beam under the effect of electric field .
☆To observe motion law of charge in magnetic field after the action of lorentz force.
☆To measure specific charge of electron.
Main technical parameters
☆Diameter of lorentz force: 153cm;
☆Helmholtz coils: equivalent radius 0.14m, single coil: 140 turns; current: 0-2A continuously adjustable;
☆Deflection voltage 50-250V, anode voltage: 0-250V continuously adjustable;
☆Measuring error of electron charge-mass ratio>5%