# Answer on Electromagnetism Question for Gio

Question #14784

A potential difference of 12 V produces a current of 0.40 A in a piece of copper wire. What is the resistance of the wire ?

Expert's answer

Let's use the Ohm's law:

I = U/R ==> R = U/I = 12V/0.4A = 30 Ω.

I = U/R ==> R = U/I = 12V/0.4A = 30 Ω.

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