[" 2.Ah electric current passes through ...

[" 2.Ah electric current passes through a long straight "],[" wire.The magnetic field at a distance "5cm" from "],[" the wire is "B" ,the magnetic field at a distance of "],[20cm" from the wire will be: "]

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[" 2.Ah electric current passes through a long straight "],[" wire.The magnetic field at a distance "5cm" from "],[" the wire is "B" ,the magnetic field at a distance of "],[20cm" from the wire will be: "]

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