7. Electron and hole concentration N = p = n i : in intrinsic semiconductor N = N D : N type semiconductor P = N A : P type semiconductor 8. Velocity V d = µE 9. Current density J = I/A ; σEA 10. Current I = V/R; neµA 11. LATTICE SCATTERING AND TOTAL SCATRING 1/u = 1/u1 + 1/u2… 12. V T equation V T = V to + ϒ (√(2∅𝐹 + 𝑉𝑆𝐵) − √2∅𝐹 ) 13. PN junction voltage V O = KT/q(N A *N D /n i 2 )
