Task: Sentence Ordering
Input (English): Steps: (1) A conducting metal, like copper, is wrapped around a piece of metal (2) An electrical source, like a battery, produces an electrical current (3) The electrical current creates a magnetic field around the wire, magnetizing the metal (4) The magnetic field can be turned on and off by starting or stopping the electricity source  
Where does the following step fit into the given list of steps: The electrical current flows through the wire 
Output (English):  After step 2.