A) Proportional to \[T\]
B) Proportional to \[\sqrt{T}\]
C) Zero
D) Finite but independent of temperature
Correct Answer: B
Solution :
In the absence of external electric field mean velocity of free electron\[\left( {{V}_{r}}_{ms} \right)\]is given by \[{{V}_{rms}}=\sqrt{\frac{3KT}{m}}\Rightarrow {{V}_{rms}}\propto \sqrt{T}\]
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