Question

For a line that has current 140 AA and a height of 8.0 mm above the ground, what magnetic field does the line produce at ground level? Express your answer in teslas.

Answer 1

Answer:

35 x 10^-7 Tesla

Explanation:

current, i = 140 A

distance, r = 8 m

The formula for the magnetic field due to a straight long wire is given by

$B=\frac{\mu _{0}}{4\pi } \frac{2i}{r}$

$B=\frac{10^{-7}\times 2\times 140}{8}$

B = 35 x 10^-7 Tesla

Thus, the magnetic field is given by 35 x 10^-7 Tesla.