B) Fleming

The right-hand thumb rule is a mnemonic technique used in electromagnetism to determine the direction of a magnetic field generated by a current-carrying conductor. It was first stated by John Ambrose Fleming, a British physicist and electrical engineer, in the late 19th century. The rule states that if the right hand is used to grip the conductor with the thumb pointing in the direction of the current flow, then the curled fingers will give the direction of the magnetic field.

The Right Hand Thumb Rule is attributed to John Ambrose Fleming, a British electrical engineer and physicist.

Fleming's Right Hand Thumb Rule is used to determine the direction of the magnetic field lines around a current-carrying wire or conductor. It states that if you wrap the fingers of your right hand around the wire, with your thumb pointing in the direction of the conventional current (from positive to negative), your fingers will curl around the wire in the direction of the magnetic field lines.

It is important to note that there are other right-hand rules in physics and engineering, such as the right-hand grip rule (also known as the right-hand screw rule) and the right-hand rule for cross products in vector analysis. However, when specifically referring to the Right Hand Thumb Rule, it is Fleming's rule that is being referenced.

Maxwell

The Right Hand Thumb Rule is a rule used in physics to find the direction of a magnetic field around a current-carrying conductor. It was first stated by Maxwell, a renowned physicist known for his contributions to the field of electromagnetism. Below are some key points about the Right Hand Thumb Rule:

Explanation:
- When using the Right Hand Thumb Rule, you point your right thumb in the direction of the current flow in a conductor.
- Your fingers then curl around the conductor in the direction of the magnetic field lines.
- The direction in which your fingers curl represents the direction of the magnetic field around the conductor.

Significance:
- The Right Hand Thumb Rule is a simple and effective way to determine the direction of the magnetic field produced by a current-carrying conductor.
- It is widely used in physics and engineering to analyze and predict the behavior of magnetic fields in various situations.

Application:
- The Right Hand Thumb Rule is commonly used in electromagnetism, electric motors, generators, and other devices that involve the interaction of magnetic fields and current-carrying conductors.
- By applying this rule, scientists and engineers can understand the relationship between current flow and magnetic fields, leading to the development of new technologies and applications.

In conclusion, the Right Hand Thumb Rule, first stated by Maxwell, is a fundamental concept in physics that helps determine the direction of magnetic fields around current-carrying conductors. Its simplicity and practicality make it a valuable tool for analyzing and solving problems related to electromagnetism.