AIIMS 2018 Physics Drift Velocity Assertion Reason Question

The assertion that drift speed $v_e$ is the average speed between two successive collisions is true, as drift speed represents the net velocity of charge carriers in a conductor due to an electric field. However, the reason provided is false because it inaccurately describes the relationship between average distance $\Delta l$ and time $\Delta t$; drift speed is not defined as the limit of $\Delta l/\Delta t$ as $\Delta t$ approaches zero, but rather as the average velocity of carriers over time due to the applied electric field.

Option A is incorrect because the reason is not a correct explanation of the assertion. Option B is incorrect as both statements cannot be true simultaneously if the reason is false. Option D is incorrect because the assertion is indeed true.