Problem 4. When a positive bias of 0.5 V is applied to the metal side of a Pt-Si junction, the junction has the capacitance of 0.25 pF. A bias of 1.5 V results in a capacitance of 0.05 pF. The junction area A = 10* cm², and the temperature T = 300 K. (a) Is the semiconductor of p- or n-type? What is the smallest value of the applied voltage at which the space-charge region in the semiconductor starts to appear? Is the metal work function bigger or smaller than the semiconductor's? (b) What is the doping level of the semiconductor? (c) What is the value of the metal work function?

Using conventional current notation, we say that electric current flows from the positive battery terminal towards the negative terminal. True False

What's 16

The voltage across a 11 uF capacitor is given by v(1) = -10³sin (10³) volts. Calculate the current in (A) at t= 251.327 ms. **Hint** Remember to include your units and round your answer to two decimal places if needed. **Calculator must be set to radians I=C*(dv/dT)