Here's why:

* Magnetic Core: Solenoids typically have a core made of ferromagnetic material (like iron) which concentrates the magnetic field generated by the coil.

* Energized Cell: The solenoid's coil is energized by a power source, like a battery or a power supply, which creates an electric current.

When current flows through the coil, it generates a magnetic field around it. The magnetic core intensifies this field, making the solenoid a powerful electromagnet.

Let me know if you have more questions!