When you take a long piece of wire, form it into a coil of several loops, and run a current through it, you get a magnetic field that runs straight along the axis of the coil.
This arrangement of a conductor and the current through it is called a "solenoid". (C)
A solenoid is a form of coil that produces a magnetic field when the electric current is passed through it. A solenoid is created when a conductive wire is used to make a loop.
A coil of wire that carries an electric current is a solenoid. A solenoid is an electromagnet formed by a helical coil of wire. Which generates a magnetic field when an electric current is passed through the coil .
In material or wire conductance is dependent on the number of mobile electrons present in the material or wire.
A conductive wire is a type of wire which has a sufficient amount of mobile electrons which are useful for producing conductance in the material.
silver, copper, iron, etc.
To learn more about the solenoid refer to the link ;
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