Shanrya Primary Coil, Physics Teaching Tool Induction Coil Galvanometer Electromagnet Kit Electromagnetic Induction Solenoid for Physics Teaching for Teacher,Shanryar8m2d7c6q98455

Specification: Item Type: Electromagnetic Induction Coil Material: PVC+Brass Purpose: Middle and high school physics experiment Applicable Experiments: Study electromagnetic induction, verify Lenz's law, study magnetic induction phenomenon The outer diameter of the hole at the bottom of the original coil is: Approx. 22 1mm / 0.9 0.04in The inner diameter of the hole at the bottom of the original coil is: Approx. 13 0.5mm / 0.5 0.02in The height of the round hole at the bottom of the original coil: Approx. 60mm / 2.4in The diameter of the hole at the bottom of the secondary coil is: Approx. 35 1mm / 1.4 0.04in The inner diameter of the circular hole at the bottom of the secondary coil is: Approx. 49 1mm / 1.9 0.04in The height of the round hole at the bottom of the secondary coil: Approx. 80mm / 3.1in Soft Length: Approx. 85mm / 3.3in Package List: 1 x Primary Coil A 1 x Secondary Coil B 1 x Soft Iron C Note: 1. Since the DC resistance of the original coil is very small, the current can not be too large, the power‑on time should not be too long, and the power supply voltage should not exceed DC4V. 2. Pay attention to protect the plastic frame, and don't let it subject to strong collision or fall on the ground. 3. After the instrument is used, it should be placed in a clean, dry and ventilated place without corrosive gas. 4.Please note that the type and old type of this product will be sent randomly, and make sure you will not mind before ordering.