Physics · Explorer

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Electromagnet strengthRunning
Field coil. Coil turns at 810 turns. Field produced 0.648 T, Field required 0.32 T. Currently field produced is over by 0.328 T.TUNING810 turns
t = 0.0s

Field produced

0.648T

Field required

0.32T

Field produced is over by 0.328 T

810 turns

Field coil. Coil turns at 810 turns. Field produced 0.648 T, Field required 0.32 T. Currently field produced is over by 0.328 T.

What has to balanceB∝NIB \propto NI

What is happening

You are called to a scrapyard lifting magnet that keeps dropping its load.

The load keeps dropping. Holding it needs 0.32 T, each turn of the coil contributes 0.0008 T at the working current, and the winding count is wrong.