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A metallic block has no potential difference applied across it. The mean velocity of free electrons at absolute temperature T is Choice 1 Proportional to T Choice 2 Finite but independent of T Choice 3 Proportional to √T Choice 4 Zero

A metallic block has no potential difference applied across it. The mean velocity  of free electrons at absolute temperature T is

 
 
Proportional to T
 
Finite but independent of T
 
Proportional to √T
 
Zero

Grade:8

1 Answers

Satyam Kumar
60 Points
4 years ago
Since no potential difference is applied, the formula for drift velocity we usually deal with is invalid. 
However, by dimesional analysis, deducing a relation between energy and Temp. we get
Energy = 0.5mv2= 1.5 k T (where k is Boltzman Constant)
vdirectly proportional to T.
Choice 3 is correct

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