An electron enters a uniform magnetic field at right angles to it as shown in the figure. In which direction will this electron move? State the principle applied by you in finding the direction of motion of the electron.

The electron will move normally outward.
Fleming's left hand rule: Stretch the forefinger, the central finger and the thumb of the left hand mutually perpendicular to each other. If the forefinger points in the direction of the magnetic field, the central finger in the direction of current, then the thumb. points in the direction of force on the conductor.
The electron will move normally outward. Fleming's left hand rule:

Fig. Fleming's left hand rule

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