NEET Physics (general) MCQ Question
Consider a conductor where electrons are moving from a point A to point B through repeated collisions, as depicted in a schematic diagram. Which of the following describes the reason why the electrons acquire a steady average drift speed despite experiencing acceleration due to the electric field?
Electrons quickly reach a terminal velocity due to continuous collisions.
The electric field periodically reverses direction, balancing the speed.
The electrons experience uniform acceleration without any collisions.
The influence of the electric field is negligible compared to thermal motion.
Correct Answer
Detailed Explanation
Electrons acquire a steady average drift speed because, while they experience acceleration from the electric field, their collisions with the lattice atoms quickly randomize their velocities, resulting in a terminal drift speed.
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