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# Calculating length of wire in existing electromagnet

## Calculating length of wire in existing electromagnet

(OP)
Hello,

I would like to ask for little help in calculating the length of wire in the existing electromagnet (bought from the shop).
I know that bought electromagnet is for DC, 24[V], 1.3[A], 33[W]. Diameter of the wire is 0.52mm. I kindly ask for help.

Thank you.

Regards

### RE: Calculating length of wire in existing electromagnet

If you know the bare wire diameter and the total resistance then assuming the resistivity is close to the standard 100% copper 5.4E-08 ohm-meter you can easily calculate the length of the wire.

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