Answer: The correct answer is "electromagnetism".
Explanation:
Electromagnetism: it is an interaction of the electricity and the magnetism.
When the current flows in the conductor then the magnetic field lines are produces around the current carrying conductor. Here, the electric current generates magnetic field. The motion of the charges produces both electric field and the magnetic field.
This phenomenon was discovered by Oersted.
If the amount of current increases then the strength of the magnetic field will also get increase. The strength of the magnetic field depends on the amount of current flowing in the conductor.
Therefore, the generation of a magnetic field by an electric current is electromagnetism.
