For the current-carrying conductor shown in Fig (a), the force known as Lorentz force) made on the conductor are often determined from the subsequent equation:
Where B, l, and that i are reciprocally perpendicular. The direction of the force is often resolute by victimization the Fleming’s left hand Rule or right-hand screw rule. The direction of the force is showed in Fig (b).
Fleming’s Left hand Rule:
“Hold on view your left hand with index finger, second finger and thumb at right angles to each another. If the index finger represents the direction of the field, and therefore the second finger that of current, then thumb offers the direction of the motion or force.”
Right-Hand Screw Rule:
Turn current vector i in the direction of the flux vector B. If a screw is turned within the same method, the direction within which the screw can move represents the direction of the force f.
Note that in each cases (i.e., decisive the polarity of the evoked voltage and decisive the direction of the force) the moving magnitudes (v and i) are turned toward B to get the screw movement.