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Fleming's left-hand rule. Fleming's left-hand rule for electric motors is one of a pair of visual mnemonics, the other being Fleming's right-hand rule for generators. [1] [2] [3] They were originated by John Ambrose Fleming, in the late 19th century, as a simple way of working out the direction of motion in an electric motor, or the direction of electric current in an electric generator.
The left hand is held with the thumb, first finger and second finger mutually at right angles. The Thumb represents F - Thrust (or resulting Motion). The First finger represents B - Field. The Second finger represents I or V - Current (in the classical direction, from positive to negative).
The subsequent letters correspond to subsequent fingers, counting from the top: thumb → F; first finger → B; second finger → I. There is also a Fleming's left-hand rule (for electric motors). The appropriately handed rule can be recalled from the letter "g", which is in "right" and "generator".
To properly fasten or unfasten a screw, one applies the above rules: if a screw is right-handed, pointing one's right thumb in the direction of the hole and turning in the direction of the right hand's curled fingers (i.e. clockwise) will fasten the screw, while pointing away from the hole and turning in the new direction (i.e. counterclockwise ...
Writing is a fine motor skill as it requires subtle motions of the hand and fingers. Motor skills are movements and actions of the bone structures. [1] Typically, they are categorised into two groups: gross motor skills and fine motor skills. Gross motor skills are involved in movement and coordination of the arms, legs, and other large body parts.
General Motors spent $1 billion to acquire the less-than-50-person team in 2016, and went on to spend more than $10 billion on the company over the next nine years.
Explanations for Kamala Harris' loss include racism, sexism, the economy wokeness and more. To chart a path forward, Democrats will need to move from narratives to facts.
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