number ULIVUd in each electromagnet wire force dry cells electrons Iron core magnetism crane electricity magnet 1. An electromagnet can be made stronger by using more coils of 2. It can produce magnets. 3. It lifts heavy objects and also made of an electromagnet 4. The greater the size of the iron core, the stronger an electromagnet has. 5. The size of the also matters. 6.More dry cells mean more flowing in the electromagnet. 7. The number of also affects the strength of an electromagnet. 8. Each turn of the wire add more to the electromagnet 9. attracts like a real magnet. 10. It is usually made of iron