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Find the resistance of an intrinsic Ge rod cm long, 1mm wide and 1mm thick at 300K.

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Find the resistance of an intrinsic Ge rod cm long, 1mm wide and 1mm thick at 300K.

(a) 2.32 ohm

(b) 5314 ohm

(c) 4310 ohm

(d) 431 ohm

I got this question in a national level competition.

My query is from Properties of Semiconductors in portion Semiconductors of Engineering Physics II

1 Answer

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The correct answer is (c) 4310 ohm

To explain I would say: Conductivity of an intrinsic semiconductor = nie(μe+μh)

Conductivity = 2.32

Resistance = ρl/A = l/(conductivy × A)

Resistance = 4310 ohm.

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