What is the importance of Oersted's experiment?

Explanation

### Step-by-Step Solution:

1. **Understanding Oersted's Experiment**: Oersted's experiment demonstrated that an electric current flowing through a conductor produces a magnetic field around it. This was a groundbreaking discovery that established a direct relationship between electricity and magnetism.

2. **Setup of the Experiment**: In the experiment, a battery is connected to a conductor, and a magnetic compass is placed near the conductor. When the current flows through the conductor, the compass needle shows a deflection.

3. **Observation of Magnetic Field**: The deflection of the compass needle indicates the presence of a magnetic field. The compass needle aligns itself with the magnetic field created by the current in the conductor.

...