Assertion: Drift speed vd is the average speed between two successive collisions. Reason: If Δ l is the average distance moved between two collision and Δ t is the corresponding time, then vd= displaystyle lim Δ t arrow 0 (Δ ℓ/Δ t).

Question

Assertion: Drift speed vd is the average speed between two successive collisions. Reason: If Δ l is the average distance moved between two collision and Δ t is the corresponding time, then vd= displaystyle lim Δ t arrow 0 (Δ ℓ/Δ t). (A) Ifboth Assertion and Reason are correct and the Reason is a correct explanation of the Assertion. (B) Ifboth Assertion and Reason are correct but Reason is not a correct explanation of the Assertion. (C) If the Assertion is correct but Reason is incorrect. (D) If the Assertion is incorrect and Reason is correct.

Tardigrade Admin · Accepted Answer

Drift speed is the average speed between two successive collision.

Q. Assertion : Drift speed vd​ is the average speed between two successive collisions. Reason : If Δl is the average distance moved between two collision and Δt is the corresponding time, then vd​=Δt→0lim​ΔtΔℓ​.

Ifboth Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

Ifboth Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.

If the Assertion is correct but Reason is incorrect.

If the Assertion is incorrect and Reason is correct.

Drift speed is the average speed between two successive collision.

Q. Assertion : Drift speed $v_{d}$ is the average speed between two successive collisions.
Reason : If $Δ l$ is the average distance moved between two collision and $Δ t$ is the corresponding time, then $v_{d} = Δ t \to 0 lim \frac{Δ ℓ}{Δ t}$ .