Which describes the requirements for making an electromagnet?
A. A battery, a length of wire, and an iron nail must be connected in an open series circuit. In addition, the wire must be coiled around the body of the battery.
B. A battery, a length of wire, and an iron nail must be connected in a closed series circuit. In addition, the wire must be coiled around the body of the nail.
C. A battery, a length of wire, and an iron nail must be connected in a closed parallel circuit. In addition, the wire must be coiled around the body of the nail.
D.A battery, a length of wire, and an

Question

Which describes the requirements for making an electromagnet?	
 A. A battery, a length of wire, and an iron nail must be connected in an open series circuit. In addition, the wire must be coiled around the body of the battery.
 B. A battery, a length of wire, and an iron nail must be connected in a closed series circuit. In addition, the wire must be coiled around the body of the nail.
 C. A battery, a length of wire, and an iron nail must be connected in a closed parallel circuit. In addition, the wire must be coiled around the body of the nail.
 D.A battery, a length of wire, and an

radar · Answer

Either B or C would do it, but the writer of the problem probably wants B.  Regardless as long as their is current going thru the coil of wire surrounding the body of the nail.  No need to discuss parallel vs series.|dw:1429120666034:dw|