Class XII - Physics
When an electron enters the magnetic field with velocity 'v'. Lorentz force acting on it is given by,
When an electron enters the magnetic field with velocity 'v'. Lorentz force acting on it is given by,
F = Bev SinѲ
When the velocity of electron is perpendicular to the
magnetic field SinѲ = 1.
Therefore,
F= Bev
From Flemings's left hand rule, the Lorentz force is
perpendicular to the direction of motion of electron. Although the direction of
electron's motion varies the force is always perpendicular to it's motion.
Hence, it follows a circular path where this Lorentz force provides the
required amount of centripetal force.
Hence, we can write,
Comments
Post a Comment