When current flows through an inductor, what is true about the magnetic field present?

When current flows through an inductor, it generates a magnetic field around it due to the fundamental principle of electromagnetism. The flow of electric current creates a magnetic field that is proportional to the amount of current and follows the right-hand rule, where the thumb points in the direction of current flow, and the fingers curl in the direction of the magnetic field lines. This magnetic field is essential for the inductor's operation, allowing it to store energy in a magnetic field and influencing the current flow as it changes.

The presence of the magnetic field in an inductor is a key characteristic that differentiates it from other electronic components. It is crucial for understanding inductive reactance and how inductors behave in AC circuits, as they resist changes in current due to this stored magnetic energy.

In summary, when current passes through an inductor, a magnetic field is indeed present, making this option the correct response to the question posed.