AVI-P0620
Induced Current Apparatus
It has the bulb in secondary and make and break arrangement in primary to show the phenomenon of self and mutual induction and principle of induction coil, workable on 6 volts.

AVI-P0618
Self and Mutual Inductance Coils
Has primary coil of 3000 turns and secondary coil of 1000, 2000 and 3000 turns.

AVI-P0619
Self and Mutual Inductance Coils
Has primary coil of 500 turns and secondary coil of 100, 250 and 500 turns with different tapping, mounted on wooden bobbins 25 mm diameter per pair.