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Grade: 12
        Althought Si is an insulator then how does it  behave as semiconductor upto heating
one year ago

Answers : (1)

Arun
21027 Points
							
Dear Karan
 
 

On heating, the electrons gain energy and hence the bonds break and the number of free electrons increases. Thus, increasing the conductivity. This formula supports the answer,

σ = ne2/(mτ)

where, 
σ = conductivity
n = number density of free electrons
e = charge in electron
m = mass of electron

τ (tau) = relaxation time 
 
 
Regards
Arun (askIITians forum expert)
one year ago
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