The more loops the coil has, the stronger the magnetic field, while the current is flowing. A magnet made from just a coil of wire isn't very strong. But when you coil the wire around an iron nail, the magnetic domains inside the nail line up and make a strong, temporary magnet.
Answers & Comments
Answer:
The more loops the coil has, the stronger the magnetic field, while the current is flowing. A magnet made from just a coil of wire isn't very strong. But when you coil the wire around an iron nail, the magnetic domains inside the nail line up and make a strong, temporary magnet.
Explanation: