If a current carrying wire is allowed to produce a magnetic field no greater tha

Question

If a current carrying wire is allowed to produce a magnetic field no greater than that of the Earth's (0.55 × 104 T) at a distance 25cm away, what is the maximum current in the wire If a current carrying wire is allowed to produce a magnetic field no greater than that of the Earth's (0.55 × 104 T) at a distance 25cm away, what is the maximum current in the wire If a current carrying wire is allowed to produce a magnetic field no greater than that of the Earth's (0.55 × 104 T) at a distance 25cm away, what is the maximum current in the wire

Explanation / Answer

Magneric field = uo I/2pi*d

where I = maximum current

d = distance

0.55*10^-4 = 4pi*10^-7*I/2pi*0.25

I = 68.75 A

so the maximum current in the wire = 68.75 A

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