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Derive an expression for conductivity of a material in terms of relaxation time

Derive an expression for conductivity of a material in terms of relaxation time

Grade:12

1 Answers

usha
25 Points
3 years ago
Conductivity():- the reciprocal of resistivity of the material of the conductor is conductivity.
Resistivity():- consider a wire of length l and area of cross section A. the drift velocity of electron is
Vd =     ……(1)
But, vd =    ……(2)
Comparing these 2 equations:-
        bcz V= El
But                         
But also,  
Comparing these 2 equation,
Now we know that
Conductivity is  
vd
Bcz,
 

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