Zero gauge wire has a diameter of 0.32in and can carry a sustained current of 150a safely. what is the magnetic field a distance 5cm from the center of a long straight segment of zero gauge wire carrying a current of 150a? this would be the field experienced by a bird sitting on the wire. select one of the following:
(a) 1.2 × 10−2t
(b) 1.9 × 10−3t
(c) 3.0 × 10−4t
(d) 6.0 × 10−4t
(e) 1.0 × 10−6t

d) 6*10^-4 T

Explanation: In order to explain this problem we have to use the Ampere law to calculate the magnetic field, which is given by:

∫B*dl=μo*I  then

B=μo*I/(2*π*r)  where r and I are the distance to the wire and the current in the wire. μo is equal 4*π*10^-7 Wb/A*m

Finally, we have:

B=4*π*10^-7*150/(2*π*0.05)=6*10^-4 T

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