3B Scientific Force on a Conductor in a Magnetic Field - Manual (Page 2)

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The direction of the motion can be found using
Fleming’s left hand rule (refer to fig. 2).
If the thumb and the first two fingers of the left hand
are held so that they are at right angles to each other,
then the first finger will represent the field, the
second finger the current and the thumb the motion.
Fig. 1 Basic set up (a magnetic field, b current, c motion)
Fig. 2 Fleming’s left hand rule (a magnetic field, b current, c motion)