Question #343189

determine the distance from a long straight wire that would produce a Magnetic Field three times that of the Earth's own field upon the application of 60.0 Ampere currents. (assuming that Earth's Magnetic Field is equal to 5x10^(-5)T and \mu _(0)=4\pi x10^(-7)T. m/A).

Expert's answer

"3B=\\frac{\\mu_0 I}{2\\pi r},\\implies"

"r=\\frac{\\mu_0 I}{6\\pi B}=8~cm."

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