Primary Secondary Coil Physical Electromagnetic Induction Coil Experiment Instrument Primary Coil Induction Solenoid _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ Primary Secondary Coil Physical Electromagnetic Induction Coil Experiment Instrument Feature: 1. This product is mainly composed of 3 parts: primary coil, secondary coil and soft iron . 2. Mainly used in middle school physics to demonstrate electromagnetic induction and verify Lenz's law. 3. Sensitive enough, it is an indispensable experimental equipment and teaching instrument. 4. Made of selected highquality metal materials, sturdy and durable, wearresistant. 5. Physical electromagnetic induction coil kit, stable performance and easy to use. Specification: Item Type: Primary Secondary Coil Set Material: Metal Model: 24010 Primary Coil: 200 Turns Inner Diameter: Approx. 11mm / 0.43in Outer Diameter: Approx. 15mm / 0.59in Secondary Coil: 370 Turns Inner Diameter: Approx. 24mm / 0.94in Outer Diameter: Approx. 30mm / 1.18in Package List: 1 x Primary Coil 1 x Secondary Coil 1 x Iron Stick _x000D_ _x000D_