What are the uses of electromagnets?

Explanation

**Step-by-Step Solution:**

1. **Understanding Electromagnets**: Electromagnets are magnets created by electric current. When electricity flows through a coil of wire wrapped around a core (often made of iron), it generates a magnetic field.

2. **Lifting Heavy Loads**: One of the primary uses of electromagnets is in cranes. They are used to lift heavy metal objects, such as scrap metal, in construction sites and factories. The electromagnet can be turned on and off, allowing for easy control of the lifting process.

3. **Medical Applications**: Electromagnets are also used in the medical field. For instance, they can help remove small metal fragments from a patient's eye or body. If a person has an injury involving metal, electromagnets can safely extract these pieces without invasive surgery.

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