Primary Secondary Coil Physical Electromagnetic Induction Coil Experimental Instrument Primary Coil A Secondary Coil B Soft Iron Core C for Physics Teaching sold2025 Protection effect: these cable saver

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Primary Secondary Coil Physical Electromagnetic Induction Coil Experimental Instrument Primary Coil A Secondary Coil B Soft Iron Core C for Physics Teaching sold2025 Protection effect: these cable saverPrimary Secondary Coil Physical Electromagnetic Induction Coil Experimental Instrument Primary Coil A Secondary Coil B Soft Iron Core C for Physics Teaching Specification: Item Type: Electromagnetic Induction Coil Material: PVC + brass. Purpose: middle and high school physics experiment Applicable experiments: study electromagnetic induction, check the Lenz law, study the phenomenon of magnetic induction The outer diameter of the hole at the bottom of