Primary and Secondary Coils

Primary and Secondary Coils are used to investigate electromagnetic induction.

Primary and secondary coils are wound on robust molded formers fitted with shielded banana jacks. The plated iron core has a molded handle for accurate positioning in the coils. The primary coil has 175 turns of 18 AWG insulated copper wire (diameter: 34 mm, length: 100 mm, resistance: 0.43 Ω, self-inductance: ≈3.1mH).

The secondary coil has three available windings with 500, 1000, and 1500 turns of 26 AWG insulated copper wire (diameter: 52 mm, length: 102 mm, resistances: 11.5 Ω; 23.3 Ω; 35.7 Ω, self-inductances ≈ 490mH; 1.97H; 4.43H). Plated iron core is 19 mm in diameter and 165 mm long (including handle). An activity guide is included.