Electricity & Magnetism
The focus is on electricity and magnetism, including electric fields, magnetic fields, electromagnetic forces, conductors and dielectrics, electromagnetic waves, and the nature of light.
Ring launcher demonstrates the Lenz’s law and effects of electromagnetically induced currents in a unique setup.
An iron core placed in a solenoid. The ring fits over the coil at some height. Press launch button on control panel to energize the coil, a large magnetic induction builds-up on the axis of coil, generating oppositely directed induced current in the ring. The two oppositely directed inductions repel, thus aluminium ring shoots up-to several in air. No effect is seen when using aluminium slit or acrylic ring.