Скачать или смотреть Transformer working model

A transformer working model demonstrates electromagnetic induction, where alternating current in one coil induces voltage in another via a shared iron core. This school science project is safe, educational, and perfect for exhibitions, using basic materials like coils and a low-voltage source. Students can light a bulb to show step-down or step-up effects.Materials NeededGather these household or easily available items for the build.Soft iron core (iron nails or laminated sheets, about 10-15 cm long).Insulated copper wire (24-28 gauge, 5-10 meters for primary and secondary coils).Low-voltage AC source (6-12V adapter or signal generator for safety; avoid mains).Small bulb or LED (1.5-6V) as load.Sandpaper, tape, switch, multimeter, and cardboard base.Step-by-Step ConstructionWind 200-300 turns of wire tightly around one half of the iron core for the primary coil, then 100-200 turns on the other half for the secondary (fewer turns for step-down).�Scrape insulation off wire ends and connect primary to AC source via switch.Attach secondary to bulb; secure coils with tape on the base.Test continuity with multimeter before powering on.How It WorksAC in the primary creates a changing magnetic field in the core, inducing voltage in the secondary proportional to turn ratio (e.g., more secondary turns step up voltage).�Power on at low voltage; the bulb glows, proving induction without direct connection. Measure voltages to show ratios, like 12V primary yielding 6V secondary.Safety and Display TipsUse low voltage to avoid shocks; supervise children. Label coils and add a diagram explaining Faraday's law for judges. Enhance with LED colors or plywood casing for YouTube demos.�
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