Homework Answers
Magnetic field due to a semi-infinite wire,
B = (
o
* I) / 4
* R)
Where
o is the vacuum permeability, I is current, and R is the radius of
the circle.
Substituting values,
B = (4
* 10-7 * 40) / (4
* 2)
= 2 * 10-6 T
= 2.00
T
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