Discussion
Assertion (A): Collection growth accelerates as a collector drop enlarges, unlike condensation.
Reason (R): Both the swept volume and the difference in fall speed increase with the collector size.
Answer: C
Correct answer: Both A and R are true, and R is the correct explanation of A
Both are true and the reason gives the mechanism. A larger collector sweeps a wider path and falls faster relative to the droplets it meets, so its rate of collection accelerates as it grows. Condensation does the opposite: the same vapour flux spread over a larger surface makes the radius grow ever more slowly, which is why condensation alone cannot produce rain.
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