State Fleming's left hand rule.
Answers
Explanation:
Fleming's left-hand rule for electric motors is one of a pair of visual mnemonics, the other being Fleming's right-hand rule[1] (for generators). 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.
Fleming's left-hand rule
When current flows through a conducting wire, and an external magnetic field is applied across that flow, the conducting wire experiences a force perpendicular both to that field and to the direction of the current flow (i.e they are mutually perpendicular). A left hand can be held, as shown in the illustration, so as to represent three mutually orthogonal axes on the thumb, fore finger and middle finger. Each finger is then assigned to a quantity (mechanical force, magnetic field and electric current). The right and left hand are used for generators and motors respectively.
Answer:
Fleming's left hand rule states that when we stretch the fore finger, central finger and thumb of left hand in mutually perpendicular direction, then
Fore Finger Indicates
DIRECTION OF MAGNETIC FIELD (Bˉ)
Central finger Indicates
DIRECTION OF CURRENT (i)
Thumb indicates
DIRECTION OF FORCE (Fˉ)