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What is the distance away from a wire with a current of 14.1 A that will...

What is the distance away from a wire with a current of 14.1 A that will produce a magnetic field of 1.5 x 10^-4 T?

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Answer #1

given B= 1.5*10^(-4)T , i =14.1A

the magnetic field at any point from a wire carrying current is B=( *i /2*pi*r);   is permeability=4pi*10^(-7)H/m

rearranging r = i / 2*pi*B =( 4*3.14*10^(-7) *14.1)/(2*3.14*1.5*10^(-4)) =0.018m =1.8cm

so at a distance 0.018m away from the wire the magnetic field wil be 1.5*10^(-4)T

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