# Answer to Question #73693 in Electromagnetism for Matthea

Question #73693

a piece of wire is 0.524m long. it is placed at right angles to form a uniform magnetic field o 0.25T. The force on the wire is 0.063N. calculate the current in the wire

Expert's answer

According to Ampère's force law (for the straight wire)

F=IBL sinα,

we get

I=F/(BL sinα )=0.063/(0.25∙0.524∙sin〖90°〗 )=0.481 A.

F=IBL sinα,

we get

I=F/(BL sinα )=0.063/(0.25∙0.524∙sin〖90°〗 )=0.481 A.

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