Answer:
I = 5000 A
Step-by-step explanation:
We will use Ampere's Law to calculate the current:

where,
B = Magnetic Field Strength = 0.1 mT = 1 x 10⁻⁴ T
μ = Permeability of Free Space = 4π x 10⁻⁷ N/A²
I = Current = ?
r = radius = 10 m
Therefore,

I = 5000 A