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1. |
A sample of germanium is made p-type by addition of indium at the rate of one indium atom for every 2.5 × 108 germanium atoms. Given, ni = 2.5 × 1019 / m3 at 300 K and the number of germanium atoms per m3 = 4.4 × 1028. What is the value of np? |
A. | 3.55 × 1018/m3 |
B. | 3:76 × 1018/ m3 |
C. | 7.87 × 1018 / m3 |
D. | 9.94 × 1018/ m3 |
Answer» B. 3:76 × 1018/ m3 | |