In the circuit of Fig. P3, calculate V1 and V2. 1 V 2 V + 5 V V2 +

3. The efficiency of a single p-n junction solar cell in converting solar energy to electricity depends on the energy band gap of the specific solar cell material, as shown in the figure below. Based on results from question #3 above and also searching the internet if necessary, give a physical explanation of the bell-shape dependence of solar cell efficiency on band gap energy, Eg. That is, why efficiency of solar cell initially increases as a function of band gap, peaks at about 1.2-1.4 eV, and then decreases as band gap further increases? 50 Si InP GaAs 40 CdTe Ge 30- C-1000 c- Cds 20 10 1 2 3 Bandgap energy, E, (eV) (%)Efficiency

Mesh current methods can greatly reduce the calculations as compared to Kirchhoff’s voltage and current laws in circuits with multiple branches. Refer to the textbook reading and the lecture for this week to answer the following post. Describe, step-by-step, the steps required to calculate all currents and voltage drops in a DC network using the Mesh Current Method.