Exhibit 22-2
the Following Question(s) Pertain to the Following Equation

question 1

Multiple Choice

Exhibit 22-2
The following question(s) pertain to the following equation which estimates the number of electrons per cubic centimeter excited to the conduction band as a function of temperature and the band gap energy. $\mathrm{n}_{\mathrm{e}}=\left(4.8 \times 10^{15} \mathrm{~cm}^{-3} \mathrm{~K}^{-3 / 2}\right) \mathrm{T}^{3 / 2} \mathrm{e}^{-\mathrm{E}_{\mathrm{e}} /(2 \mathrm{RT}) }$
Refer to Exhibit 22-2. The band gap of pure crystalline silicon is 1.94×10^-19 J at 300 K. How many electrons are excited from the valence band to the conduction band at this temperature in a 1.00 cm³ silicon crystal?

• A) 1.70×10⁹
• B) 4.80×10¹⁵
• C) 0.555 N_A
• D) 1.46×10⁷

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