A transmission wire carries a current of 100A. What would be the magnetic field B at a point on the road if the wire is 8 m above the road?

Explanation

To find the magnetic field \( B \) at a point on the road due to a transmission wire carrying a current of 100 A and located 8 m above the road, we can use the formula for the magnetic field due to an infinite straight wire:

\[ B = \frac{\mu_0 I}{2\pi d} \]

where:
- \( B \) is the magnetic field,
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