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What is the diffusion length for electrons when Dn=10cm^2/s and τn=40s?

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What is the diffusion length for electrons when Dn=10cm^2/s and τn=40s?

(a) 50cm

(b) 25cm

(c) 20cm

(d) 15cm

The question was asked in my homework.

Asked question is from The Continuity Equation topic in division Conduction in Semiconductors of Electronic Devices & Circuits

1 Answer

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Best answer
Right choice is (c) 20cm

Easiest explanation: Ln=√(Dn*τn)

=√(10*40)

=20cm.

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