What is the magnitude of the magnetic field created 4.0m away from a 10.0 A current?

The magnitude of the magnetic field created is 5 x 10⁻⁷ T

Explanation:

Given;

magnitude of current, I = 10.0 A

distance of the magnetic field, r = 4.0m

Apply Biot-Savart Law to determine the magnitude of of the magnetic field created;

where;

B is the magnitude of of the magnetic field

μ₀ is constant

I is current

r is the distance of the field

Therefore, the magnitude of the magnetic field created is 5 x 10⁻⁷ T

a.metals can become magnetic if they have many spinning electrons that create magnetic fields.d.only some metals are attracted by magnets; these metals are called ferromagnetic.

d.wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current.