Question

Write a short note on Fleming's left hand rule.​

Answer 1

Explanation:

It is found that whenever a current carrying conductor is placed inside a magnetic field, a force acts on the conductor, in a direction perpendicular to both the directions of the current and the magnetic field. While current flows through a conductor, one magnetic field is induced around it.

Answer 2

When a current-carrying conductor comes under a magnetic field, there will naturally be a force acting on the conductor. Fleming’s Left-Hand Rule is a simple and accurate way to find the direction of force/motion of the conductor in an electric motor when the magnetic field direction and the current direction are known. It was originally developed by John Ambrose Fleming, an English electrical engineer, in the late 19th century.

At its core, the left-hand rule is a visual mnemonic that uses the thumb, the index finger, and the middle finger of the left hand. The hand is held with the palm up, the thumb and middle fingers aligned as though they were joined end-to-end, and the index finger held out in a perpendicular fashion. The rubric for this rule is as follows:

•    Thumb: The thumb is a representation of the direction of thrust on the conductor.
•    Index Finger: Also known as the forefinger, this represents the direction of the magnetic field.
•    Middle Finger: Also known as the center finger, is representative of the direction of the current.