Answer:
B. A solenoid carries an electric current.
C. An electromagnet is a solenoid with a metal core.
E. A solenoid induces a magnetic field in a metal core.
Explanation:
An electroiman is a large number of wire turns (solenoid) that are wrapped around a magnetic core made of a ferromagnetic or ferrimagnetic material, such as iron. The metal core is composed of "tiny imans", when a current is passed through the solenoid, its magnetic field penetrates the iron, and causes the "tiny imans" to aligning parallel to the magnetic field, creating a large magnetic field.
