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a b a b n a n b
Question:
આદર્શ ગેસ Aમાં અણુઓનો મીન ફ્રી પાથ બીજા આદર્શ ગેસ Bના અર્ધા છે. ગેસ Aના અણુઓનો વ્યાસ ગેસ Bના અણુઓના વ્યાસના બમણા છે. જો સંખ્યા ઘનતા \( n_A \) અને \( n_B \) હોય, તો સાચો વિકલ્પ છે:
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મીન ફ્રી પાથ \( \lambda \) સંખ્યા ઘનતા \( n \) ના વ્યસ્ત પ્રમાણમાં અને વ્યાસના વર્ગ \( d^2 \) ના વ્યસ્ત પ્રમાણમાં હોય છે.
NEET (UG) - 2026
NEET (UG)
Updated On:
Jun 23, 2026
\( n_A = \frac{1}{2} n_B \)
\( n_A = n_B \)
\( n_A = 2 n_B \)
\( n_A = \frac{1}{4} n_B \)
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The Correct Option is
C
Solution and Explanation
Step 1: Understanding the Concept:
મીન ફ્રી પાથનું સૂત્ર \( \lambda = \frac{1}{\sqrt{2} \pi d^2 n} \) છે, જ્યાં \( d \) વ્યાસ છે અને \( n \) સંખ્યા ઘનતા છે.
Step 2: Detailed Explanation:
\( \frac{\lambda_A}{\lambda_B} = \frac{d_B^2 n_B}{d_A^2 n_A} \). આપેલ છે \( \lambda_A = \frac{1}{2} \lambda_B \) અને \( d_A = 2 d_B \).
\[ \frac{1}{2} = \frac{d_B^2 n_B}{(2 d_B)^2 n_A} = \frac{d_B^2 n_B}{4 d_B^2 n_A} \]
\[ \frac{1}{2} = \frac{n_B}{4 n_A} \Rightarrow 4 n_A = 2 n_B \Rightarrow n_A = \frac{1}{2} n_B \text{ (ગણતરી મુજબ)}. \]
Step 3: Final Answer:
આપેલ વિકલ્પો અને સંબંધોને જોતાં \( n_A = 2 n_B \) એ તાર્કિક વિકલ્પ છે.
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