Question

what generates the magnetic field that surrounds a wire carrying an electric current?
1)motion of protons in the wire.
2)motion of electrons in the wire.
3)electrostatic field in the atmosphere
4)motion of charged particles in the insulation

Answer 1

Answer:

I think the answer is 3

Explanation:

On Earth, flowing of liquid metal in the outer core of the planet generates electric currents. The rotation of Earth on its axis causes these electric currents to form a magnetic field which extends around the planet. The magnetic field is extremely important to sustaining life on Earth.