Which of the following occurs when an electric current is passed through a solenoid?

When an electric current passes through a solenoid, the key effect that occurs is the production of a magnetic field. A solenoid consists of a coil of wire, and when current flows through this coil, it generates a magnetic field around it due to the movement of electric charges. This magnetic field resembles that of a bar magnet, with distinct north and south poles.

The strength and direction of the magnetic field can be influenced by several factors, including the amount of current flowing through the wire and the number of turns of the coil. This phenomenon is fundamental in electromagnetism and is the principle behind many applications, such as in electric motors and transformers.

The other options present potential effects of electric currents in different contexts but do not accurately describe the primary outcome of passing current through a solenoid. For example, while resistive heating can occur due to current flow, it is not the defining characteristic of a solenoid. Instead, the notable aspect is the creation of a magnetic field.