Name a common device that uses electro magnets.

Explanation

**Step-by-Step Text Solution:**

1. **Understanding Electromagnets**: An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. It can be turned on and off, making it useful in various applications.

2. **Identifying Common Devices**: To answer the question, we need to think of devices that we commonly encounter in our daily lives that utilize electromagnets.

3. **Listing Examples**: Some common devices that use electromagnets include:
- Electric fans
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