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Question 5 The total number of charges in the p-depletion region _________ that in the n-depletion region in a pn junction.

(60+5 bonus points)   Problem I:  Consider a GaAs pn junction diode with doping Nd = Na = 6 × 1016 cm−3. The electron and hole mobility values are μn = 5000 cm2/V-s and μp = 200 cm2/V-s, respectively, and the lifetime values are τ 0 = τ n0 = τ p0 = 1.8 × 10−8 s, ni= 1.6 × 106 cm−3, and relative permittivity is 13.1.  Calculate Vbi , Calculate the depletion region thickness W under a reverse bias of Va= -100 Vt, Vt=kT/e   Calculate the generation current density Jgen under a reverse bias of Va= -200 Vt.     (Permittivity of vacuum ε0 = 8.85×10-14 F/cm, electronic charge q = 1.6×10-19 C, Boltzmann constant  k = 8.62×10-5 eV/K, Planck constant h = 6.63×10-34 Js, Electronic volt eV =1.6×10-19 J)     Problem II:  Assume all the semiconductors considered here are uniform, nondegenerate, and in equilibrium. Given the information provided in each case in the table below, please fill in the missing information in the blank cells.   Cases ii)-iii). Assume ii-iii) are at room temperature.   (Optional, 5 bonus points) cases iv) and v). The value in the cell with “—“ is not provided. Do not assume it is zero.   Cases n (cm-3) p (cm-3) ND (cm-3) NA (cm-3) ND+ (cm-3) NA- (cm-3) ni (cm-3) Doping Type (intrinsic, n or p) Regime (intrinsic, extrinsic, partial ionization) i 1016 1016 0 0 0 0 1016  intrinsic intrinsic ii     1018 6×1017 1×1018 6×1017 1010     iii     8×1015 2×1016     1012     iv (Optional ) 1011 10-15 4×1013 2×1012 —   10-2     v (Optional )     2×1015 9×1014     7×1017           

__________ is a tool that can help identify the direction of a stock’s price.

The term random walk is used in investments to refer to __________.

One type of passive portfolio management is __________.

OPL Corporation is expected to pay a dividend of $3 in the upcoming year. Dividends are expected to grow at the rate of 6% per year. The risk-free rate of return is 4%, and the expected return on the market portfolio is 12%. The stock of OPL Corporation has a beta of 0.75. Using the constant-growth DDM, the intrinsic value of the stock is __________.

Beta is a measure of __________.

Using the Gordon Growth Model and the provided data, what is the estimated value of Sonoco Products Company (SON) stock? • Recent annual dividend (D0 ): $1.24 • Expected dividend growth rate (g): 4.0% • Beta (β): 0.95 • Equity risk premium: 4.5% • Risk-free rate (Rf): 3.0%

This is a FOUR-PART question: 1. DEFINE debt ratio (for 2 points) 2. STATE the equation to calculate the debt ratio (for 2 points) 3. EXPLAIN briefly what the bad debt ratio is used for (for 2 points) 4. STATE the equation to calculate the bad debt ratio (for 2 points)

Kansas City Southern Preferred 20% (NYSE: KSU-P), issued 2 January 1996, has a par value of $25 per share. Thus, a share pays 0.20($25) = $5.00 in annual dividends. The required rate of return on this security is estimated at 5%. Estimate the value of this issue.