پچھلے سال NEET سوال - حرکی نظریہ L-4

سوال: ایک گیس کے مالیکیولز کا اوسط آزاد راستہ، (رداس $r$) کس کے الٹ متناسب ہے؟ [CBSE AIPMT 2014]

A) $r^3$

B) $r^2$

C) $r$

D) $\sqrt{r}$

جواب: $\sqrt{r}$

حل:

اوسط آزاد راستہ (I) اس طرح دیا جاتا ہے $$ l=\frac{1}{\sqrt{2} n \pi d^2} \Rightarrow l \propto \frac{1}{d^2} $$

لہذا، $\quad l \propto \frac{1}{r^2}$



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