The key idea
Start with the central idea, then test it against a concrete element or example. A scientific model is useful when we know what it explains — and where its limits are.
Why it matters
A changing magnetic flux through a circuit is associated with an induced electromotive force. Faraday’s law quantifies the effect and Lenz’s law fixes its opposing sense.
A picture to remember
Generators, transformers and many sensors grow from this deceptively compact idea.
The key idea
Start with the central idea, then test it against a concrete element or example. A scientific model is useful when we know what it explains — and where its limits are.
The key idea
A changing magnetic flux through a circuit is associated with an induced electromotive force. Faraday’s law quantifies the effect and Lenz’s law fixes its opposing sense.
A changing magnetic flux through a circuit is associated with an induced electromotive force. Faraday’s law quantifies the effect and Lenz’s law fixes its opposing sense.