They can use the temporary magnetic field it creates to pick p a metal clip.
Explanation:
When a copper wire is wound around an iron cylinder and current is passed through the wire, the wire wound cylinder acts like a magnet. It is known that a current carrying wire develops a magnetic field around it. This is the magnetic effect of electric current.
When the current carrying wire is wound around a cylinder it will become similar to a solenoid which is a device that continuously produces magnetic field on passing current through it.
The magnetic field will cease existing once the current supply is cut off and thus it is temporary.
