How do eddy currents created by alternating magnetic fields change with distance and magnet strength?

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Why do induction furnace use a hollow coil and in a induction cooker you just keep the food on the coil.

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Anonymous 0 Comments

Magnetic fields follow the inverse square law. If the magnet is twice as far away, the field is one fourth of the strength, and the Eddy currents will be one fourth as strong. If you make the magnet twice as strong, the currents become twice as strong.

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