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#12AWG copper wire (0.081” diameter) has a current carrying capacity of 20A. (a)With 20 A in...

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Physics

#12AWG copper wire (0.081” diameter) has a current carryingcapacity of 20A. (a)With 20 A in the wire, what is the magnitude ofthe magnetic field the surface of the wire? (b) If a very long,straight piece of this wire is placed in the Earth’s magnetic fieldat sea level (~ 0.5 Gauss)with the wire at right angles to thefield, where are the points at which the Earth’s magnetic field iscanceled, i.e. the net magnetic field is zero?

Answer & Explanation Solved by verified expert
4.3 Ratings (660 Votes)
Given DataDiameter D 0081 inches 2058 mm so approx 206 mmTherefore radius R 103 mmSubpart a A wire is carrying 20A current so I 20 AWe have asked to calculate the magnitude of the magnetic fieldon the surface    See Answer
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