How is a magnetic field produced?

Explanation

To understand how a magnetic field is produced, we can break it down into several key concepts and scenarios:

### Step 1: Understanding Magnets
- **Magnets** are the most basic source of magnetic fields. A magnet has two poles: a north pole and a south pole.
- The magnetic field lines emanate from the north pole and enter the south pole.

### Step 2: Magnetic Field from a Current-Carrying Conductor
- A **current-carrying conductor** (like a wire) also produces a magnetic field.
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