Write the usage of electromagnets.

Explanation

### Step-by-Step Text Solution

1. **Definition of Electromagnets**: Electromagnets are magnets in which the magnetic field is produced by an electric current. They consist of a coil of wire, often wrapped around a core of ferromagnetic material.

2. **Common Household Appliances**: Electromagnets are widely used in various household appliances. For example:
- **Fans**: They use electromagnets to rotate the blades.
- **Motors**: Electric motors utilize electromagnets to convert electrical energy into mechanical energy.
- **Mixers and Grinders**: These appliances employ electromagnets for their operation.
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