Faraday's Induction Experiments

Also called

electromagnetic induction · Faraday's experiments · induced current · induced potential difference · galvanometer · bar magnet and coil · two coils · primary coil · secondary coil · changing magnetic field · plug key · Fleming's right-hand rule · generator principle · विद्युत चुंबकीय प्रेरण · प्रेरित धारा · गैल्वेनोमीटर · कुंडली

Topics

• Moving a magnet towards a coil induces a current in the coil: the galvanometer needle deflects.
• Pulling the magnet away induces a current in the opposite direction: the needle deflects the other way.
• When the magnet and coil are at rest relative to each other, no current is induced and the needle reads zero.
• It is the change in the magnetic field through the coil that induces the current, not the field itself.
• When the current in a nearby primary coil is switched on, a momentary current is induced in the secondary coil.
• Switching the primary off induces a momentary current in the opposite direction; steady current induces nothing.
• The faster the magnetic field changes, the larger the induced potential difference and current.
• A galvanometer detects small currents and shows their direction by the way its needle swings from the centre.

About this model

A GLB file of about 366 KB, shown in Lably's 3D viewer and, on a phone, placed in your room with AR. Credit: Model, science and animation: Lably (built procedurally with three.js; no downloaded meshes). | CC BY 4.0. Original geometry and animation made for Lably.

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