12
Question
A moving electron entres a uniform and perpendicular magnetic field. Inside the magnetic field, the electron travels along:
A moving electron entres a uniform and perpendicular magnetic field. Inside the magnetic field, the electron travels along:
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Solution
The correct option is D A circle
Electrons in a magnetic field feel a force perpendicular to their velocity. Since their movement is always perpendicular to the force, magnetic forces due no work and the electron's velocity stays constant. Since the force is F=qvB in a constant magnetic field, an electron feels a force of constant magnitude always directed perpendicular to its motion. The result is a circular orbit.
Electrons in a magnetic field feel a force perpendicular to their velocity. Since their movement is always perpendicular to the force, magnetic forces due no work and the electron's velocity stays constant. Since the force is F=qvB in a constant magnetic field, an electron feels a force of constant magnitude always directed perpendicular to its motion. The result is a circular orbit.
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