The fact that current is associated with a magnetic field was first discovered by which of the following scientists ?

Options

A. Oersted
B. Maxwell
C. Faraday
D. Ohm

Explanation

To solve the question of who first discovered the relationship between electric current and magnetic fields, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the scientist who first discovered that electric current is associated with a magnetic field.

2. **Identifying Key Concepts**: The key concepts here are "electric current" and "magnetic field." We need to find out which scientist made the connection between these two phenomena.

3. **Historical Context**: The discovery of the relationship between electric current and magnetic fields is a significant event in physics. It is important to know the contributions of various scientists in this area.

4. **Researching the Scientists**: Among the prominent scientists in the field of electromagnetism, we need to focus on their experiments and findings related to electric current and magnetic fields.

5. **Finding the Right Scientist**: The scientist who is credited with the discovery that electric current produces a magnetic field is Hans Christian Oersted. He conducted an experiment where he observed that a compass needle deflected when placed near a current-carrying wire.

6. **Conclusion**: Based on Oersted's experiment, it was established that wherever there is an electric current, there is a magnetic field surrounding it. Therefore, the answer to the question is Hans Christian Oersted.

### Final Answer:
The fact that current is associated with a magnetic field was first discovered by Hans Christian Oersted.

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