Induction coils demonstration: MAKApp C6

Consists  of two coils wound on separate bobbins, one having many turns of fine wire & the other with few turns of heavy wire. It demonstrates that induced potentials are produced either by movement of a permanent or electromagnet or by a change of current in one coil, fitted with insulated 4mm socket terminals & supplied with a soft iron core, outer coil is 12.5cm long &5cm diameter.