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The radius of the straight circular power cord is R = 0.55 cm and it has...

The radius of the straight circular power cord is R = 0.55 cm and it has a current of I = 1.3 A. Calculate the magnetic field strength B caused by the power cord
a) at a distance r1 = 0.16 cm from the axis of the power cable.
b) at a distance r2 = 1.7 cm from the axis of the power cord.
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