Fleming’s Left-Hand Rule was given in the late 19th century by John Ambrose Fleming.
Fleming’s left rule is the simple way to find the Force on the conductor when the direction of the applied magnetic field and the direction of conductor current are known.
Principle:
If you placed the current-carrying conductor in the magnetic field, then force acts on the conductor is perpendicular to both direction of the magnetic field and the current flowing through the conductor.
Now we arrange the thumb, middle finger, and index finger of the left hand in orthogonal to each other then, the thumb represents the direction of force, the middle finger represents the direction of current and the index finger represents the direction of the magnetic field.
Application:
Electric Motors.
Reference Source:
[1] Fleming’s Left-Hand Rule and Fleming’s Right-Hand Rule – Statement, Examples, Video and FAQs. BYJUS. Published July 2, 2019. Accessed April 18, 2022. https://byjus.com/physics/flemings-left-hand-rule-and-right-hand-rule/#:~:text=left%2Dhand%20rule.-,Fleming’s%20Left%20Hand%20Rule%20states%20that%20if%20we%20arrange%20our,finger%20points%20towards%20the%20direction
[2] Wikipedia Contributors. Fleming’s left-hand rule for motors. Wikipedia. Published December 12, 2021. Accessed April 18, 2022. https://en.wikipedia.org/wiki/Fleming%27s_left-hand_rule_for_motors
[3] Wikipedia Contributors. John Ambrose Fleming. Wikipedia. Published March 20, 2022. Accessed April 18, 2022. https://en.wikipedia.org/wiki/John_Ambrose_Fleming
[4] Vedantu. Fleming’s Left Hand Rule and Right Hand Rule. VEDANTU. Published May 22, 2020. Accessed April 18, 2022. https://www.vedantu.com/physics/flemings-left-hand-rule-and-right-hand-rule
[5] Fleming’s Left-Hand Rule: Electric Motor Theory Explained. Automate. Published 2019. Accessed April 18, 2022. https://www.automate.org/blogs/fleming-s-left-hand-rule-electric-motor-theory-explained