An intrinsic semiconductor has a resistivity of 0.50 Ωm at room temperature. Find the intrinsic c...

An intrinsic semiconductor has a resistivity of 0.50 Ωm at room temperature. Find the intrinsic carrier concentration if the mobilities of electrons and holes are 0.39  m^2 V^-1 s^-1 and 0.11  m^2 V^-1 s^-1 respectively
(a) 1.2 × 10^18 m^-3
(b) 2.5 × 10^19 m^-3
(c) 1.9 × 10^20 m^-3
(d) 3.1 × 10^21 m^-3

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