IGNOU BPHCT 135 2026 - Define mean free path? Obtain an expression of mean free path for zero

Question

Define mean free path? Obtain an expression of mean free path for zeroth order approximation.

19 Jan 2026

Answer :

Word Count : 298

The mean free path is defined as the average distance travelled by a molecule between two successive collisions with other molecules. It is a fundamental concept in kinetic theory and statistical mechanics, as it connects microscopic molecular motion with macroscopic transport properties such as viscosity, diffusion, and thermal conductivity. To obtain an expression for the mean free path in the zeroth order approximation, a simple model of a gas is considered. The gas is assumed to consist of identical spherical molecules of diameter d, moving randomly

____ _____ _________ _____ __________ __________.
______ ________ _______ _______ _____ _______ ______.
___ _______ _______ _______ ______ _____ _____ ___ ___ __________.
______ __________ ______ _________ __________ _________ ____ _____ _________ _______ _____ ___.
____ __________ _______ _______ _____ ____ _________.
_________ _____ ___ ____ __________ ______ _________ ____ __________ _____.
_____ _______ ___ ______ _________ __________ _________.
_________ ________ _________ ____ _______ ____ ____ __________ ____ ________ _________ ________.
_________ __________ _________ ________ _____ ________ ___ ______ _________.
________ _________ ________ _________ ______ ____ _______ ______ __________ ____ ___.
_________ ______ ____ _________ ____.
____ ____ _____ _______ ____.
_____ _________ ____ _________ __________ __________ ________ ____.
_____ ______ _____ ____ ___.
_________ _______ _______ ________ ____ __________ _________.
_________ __________ ________ ____ ________ ________ ________.
__________ __________ ___ ____ ________ _______ ___ __________ ________ _______ ________.
________ ________ ___ ______ ________ ______ _____.
_______ ______ _________ _____ ___ __________ __________ _____ _____.
________ _________ ______ ___ __________ _________ ______ _______ ___ ___ ___.
______ ___ __________ _________ _______ ________ ___.
___ ____ _______ ____ _______ ________.
_______ ______ ____ ________ _______.
_______ ______ ___ ______ _______ _________ _____ ____ _______ _______ ___.
__________ ____ ___ _________ ___ ___ _________ _______ ___ ________ __________.
____ ____ _________ ______ ____.
________.

IGNOU ACADEMY

Your IGNOU journey, made easier.

Solved Assignments
Study Notes
Guess Papers
Question Papers

Call Us WhatsApp

STUDY • PREPARE • SUCCEED

Skip in 10

IGNOU Solved Assignments Assignments Ignou Projects Project Previous Year Solved Exam Papers Notes Notes Sample Question Papers Sample Question Papers