In pink wire: The force is acting ‘upwards.’ We can see the direction of the Force and magnetic field in Fig.3 Now, let us apply Fleming’s left-hand rule for the blue wire:Īs soon we applied Fleming’s left-hand rule: Now, look at the pink wire, and observe the direction of the current to determine the direction of the force and the magnetic field: Here, in the above diagram of the electric motor, we notice that each side of the loop behaves as a current-carrying conductor.Īlso, the direction of force is different at each side of this conductor, and that force is acting on that conductor due to the production of the magnetic field, these magnetic field lines would make varying forces at each side, and the direction of the force at each side of this loop can be determined by using Fleming’s left-hand rule, and electricity changes to the rotatory motion. Let's take a rectangular current carrying loop and put it inside the magnetic field as shown below: Theory behind 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 orthogonal both to that field and direction of the current flow, like we see in the image below: On this page, we shall learn the following things:ĭifference between Fleming’s left-hand and fleming’s right-hand ruleįleming’s Left-hand Rule Application: Working of an Electric Motor The representation for right-hand rule is as follows: Index finger: It points in the direction of the magnetic field. Middle finger: It points in the direction of the induced current. Thumb: It is along the direction of motion of the conductor. Index finger: It represents the direction of the magnetic field (B)įleming's Right hand Rule states that if we stretch the thumb, middle finger, and an index finger in such a way that they are mutually perpendicular to each other. Middle finger: It represents the direction of the current (I) Thumb: It points towards the direction of force (F) Then the direction for each finger is represented as follows: The index finger of the left hand in such a way that they make an angle of 90 degrees (Perpendicular to each other) and the conductor placed in the magnetic field experiences Magnetic force. Electric motors are predominantly affected by Fleming's Left-Hand Rule, while electric generators are primarily affected by Fleming's Right-Hand Rule.įleming’s Left-hand Rule and Fleming’s Right-hand Ruleįleming’s left- hand rule states that if we stretch the thumb, middle finger and the It's vital to note that these rules don't define magnitude rather, they demonstrate the direction of the three parameters (magnetic field, current, and force) when the other two parameters' directions are known. The direction of the induced current can be determined using Fleming's Right-Hand Rule. Similarly, if a moving conductor is placed in a magnetic field, an electric current will be induced in it. When a current-carrying conductor is kept in a magnetic field, a force applies on it the direction of this force can be determined using Fleming's Left-Hand Rule.
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