I keep getting “Lenz's law” questions wrong in Magnetism & Electromagnetic Induction. What's the trap?
getting the direction of induced current backwards.
The usual trap: getting the direction of induced current backwards. How to avoid it: nature resists change: the induced current fights the flux change. Go back to the definition — the induced current always opposes the change that produced it, ensuring energy conservation.
Key point
Lenz's law
Common mistake
getting the direction of induced current backwards.
Memory tip
nature resists change: the induced current fights the flux change.
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