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Question
The drift velocity of a free electron inside a conductor is ______
Options
the thermal speed of the free electron.
the speed with which a free electron emerges out of the conductor.
the average speed acquired by the electron in any direction.
the average speed of the electron between successive collisions m in the direction opposite to the applied electric field.
Solution
The drift velocity of a free electron inside a conductor is the average speed of the electron between successive collisions m in the direction opposite to the applied electric field.
Explanation:
When no e.m.f. is applied, electrons move at random within the conductor. When e.m.f. is applied, electrons drift in the opposite direction and collide. The average speed in the direction of the field between collisions is Vd.
