Nate Core Practice Test 2026 – Comprehensive Exam Prep

The establishment of a magnetic field around a conductor is directly linked to the flow of electric current through it. When current passes through a conductor, it creates a magnetic field due to the movement of charged particles. The strength and direction of this magnetic field can be determined by the right-hand rule, which states that if you grip the conductor with your right hand such that your thumb points in the direction of the current, your fingers will curl in the direction of the magnetic field lines.

Applying voltage influences the machinery, but it is the actual flow of electric current that induces the magnetic field. Additionally, coiling a conductor, as seen in electromagnets, enhances the magnetic field created, but the initial requirement for a magnetic field to exist is the current flow itself. Placing a conductor in an external magnetic field does not establish a magnetic field around it but could induce a current in it according to electromagnetic induction principles.