Magnetic field solenoid manufacturers tell you that in physics, the term solenoid refers to a multi-winding wire, which can be hollow inside, or have a metal core. When current is passed through the wire, a uniform magnetic field is generated inside the solenoid. Solenoids are very important components. Magnetic field solenoid manufacturers tell you that many physical experiments require a uniform magnetic field to operate correctly. Solenoids can also be used as electromagnets or inductors.

The manufacturer of the magnetic field solenoid tells you that because of electromagnetic induction, the conducting conductor will generate a magnetic field, and the magnetic effect of the current (electrokinesis will generate magnetism): Oster found that any wire carrying current can generate a magnetic field around it, Magnetic effect called current.
A non-magnetic metal can generate a magnetic field when an electric current is passed through it.
The magnetic field solenoid manufacturer tells you that a magnetic field will be generated around a long straight wire passing through a current. The shape of the magnetic field line is a closed concentric circle with the wire as the center, and the direction of the magnetic field and the direction of the current are perpendicular to each other.