Final answer:
The magnetic field inside a long cylindrical wire carrying a uniformly distributed current is zero. Outside the wire, the magnetic field can be calculated using the formula B = (μ0I)/(2πr).
Step-by-step explanation:
The magnetic field inside and outside a long cylindrical wire carrying a uniformly distributed current can be calculated using Ampere's law. When we apply Ampere's law to a cylindrical wire, we find that the magnetic field inside the wire is zero due to the cancellation of magnetic fields from different parts of the wire. Outside the wire, the magnetic field can be calculated using the formula B = (μ0I)/(2πr), where B is the magnetic field, μ0 is the permeability of free space, I is the current, and r is the distance from the wire.