Question

There are 6*10¹⁹ electrons per unit cubic metre of pure semiconductor. What will be the number of holes for this semiconductor of dimension 1 cm*1 cm*2 cm? [Ans: 12*10¹³ ]

Answer 1

Dear Student,

◆ Answer -

Nh = 1.2×10^14 holes

◆ Explaination -

No of electrons in the semiconductor is -

Ne = 1×10^-2 × 1×10^-2 × 2×10^-2 × 6×10^19

Ne = 1.2×10^14 e-

We know that no of holes is equal to no of electrons, thus no of holes in semiconductor is 1.2×10^14. i.e. Nh = 1.2×10^14 holes.

Hope this helps you..

Answer 2

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