Question

Who discovered the relationship between electricity and magnetism
A. Faraday
B. Newton
C. Maxwell
D. Oersted

Answer 1

Hint: electricity or electric current is a phenomenon that is associated with a stationary or moving electric charge. Magnetism is a phenomenon that is associated with the magnetic field that arises from the movement of electric charge. The relationship between electricity and magnetism is termed as electromagnetism.

Complete step by step answer:
Electricity and magnetism are the terms that involve the attraction and repulsion between the charged particles. The interactions between these terms are termed as electromagnetism. These terms are interrelated because the movement of magnet generates electricity and the flow of electricity generates magnetism.
In the early days, scientists had believed that electricity and magnetism are two separate forces. But after the publication of James Maxwell, everyone treated these forces as interrelated forces.
However, in 1920, Hans Christian Oersted had experimented with the wire. When he switched on the battery which is providing the current, the compass needle moved away from the north. Therefore, from this experiment, he concluded that the electric current that is flowing through the wire produces a magnetic field. This phenomenon is shown below

The above figure shows that the electric current, which is flowing through the wire, will generate a magnetic field. This magnetic field will be in the circular form and it Is generated outside the wire. The direction of the magnetic field will be clockwise or anti-clockwise depending upon the direction of the electric current.
Also, a changing magnetic field will produce an electric current in a wire or conductor.
Therefore, the relationship between electricity and magnetism was discovered by Hans Christian Oersted.

So, the correct answer is “Option D”.

Note:
Also, the electrical and magnetic properties of some materials are coupled with each other.
Therefore, we can say that the electric properties can be influenced by the magnetic field and magnetic properties can be influenced by the electric field.
Hence, in this way, electric and magnetic properties are interrelated.