1. A Germanium sample is 5 mm long and has a rectangular cross-section, 50 μm by 150 μm. A Phosphorus atom with concentration of 4.4 x 10¹5/cm³ at 300 K is added and corresponds to one impurity atom for 107 Ge atoms. A steady current of 3 μA exists in the bar. a. Set up the equations for concentrations, conductivity, resistance, and voltage. b. Solve for the electron and hole concentration, conductivity, resistance, and voltage.

1. A Germanium sample is 5 mm long and has a rectangular cross-section, 50 μm by 150 μm. A Phosphorus atom with concentration of 4.4 x 10¹5/cm³ at 300 K is added and corresponds to one impurity atom for 107 Ge atoms. A steady current of 3 μA exists in the bar. a. Set up the equations for concentrations, conductivity, resistance, and voltage. b. Solve for the electron and hole concentration, conductivity, resistance, and voltage.