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Question

Physics Question on kinetic theory

To find out degree of freedom, the correct expression is:

A

f=2γ−1f=\frac {2}{γ-1}

B

f=γ+12f=\frac {γ+1}{2}

C

f=2γ+1f=\frac {2}{γ+1}

D

f=1γ+1f=\frac {1}{γ+1}

Answer

f=2γ−1f=\frac {2}{γ-1}

Explanation

Solution

∵ γ=1+2fγ=1+\frac 2f

⇒ 2f=γ−1\frac 2f=γ-1

⇒ f=2γ−1f=\frac {2}{γ-1}

So, the correct option is (A): f=2γ−1f=\frac {2}{γ-1}