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Lenz's law states that induced currents oppose the change causing them. It ensures energy conservation and determines the direction of induced effects.
Guia passo a passo
- 1Apply the right-hand rule with thumb opposite to flux change direction
- 2Fingers curl in direction of induced current
- 3Induced field opposes the original change
Exemplos resolvidos
Entrada
Increasing flux into coil (using right-hand rule)
Resultado
Induced current creates field opposing the increase
Lenz's law applies
Erros comuns a evitar
- ✕Assuming induced effects aid the cause (incorrect)
- ✕Confusing current direction with field direction
Perguntas frequentes
Why does Lenz's law matter?
It ensures electromagnetic induction follows energy conservation; induced effects always oppose changes.
Is Lenz's law separate from Faraday's law?
No, the negative sign in Faraday's law IS Lenz's law; it's the same concept expressed mathematically.
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