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Materials and Components

Q1: The minority carrier life time and diffusion constant in a semiconducting material are 100 μs and 100 cm2/s respectively. The diffusion length of carriers is

A 0.1 cm

B 0.01 cm

C 0.0141 cm

D 1 cm

ANS:A - 0.1 cm

Diffusion length = sqrt(Carrier life time x Diffusion constant) = (100 x 10-6 x 100)0.5 = 0.1 cm.



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