Asi solar cell with a dark saturation current of 6na is illuminated in such a way that the shortcircuit current is 250ma. plot the i-v characteristic. then, consider the same solar cell with a series resistance of 3.0  (which would reduce the cell voltage by the corresponding ir drop) and re-plot the i-v characteristic. will the fill factor ff change and how? use matlab (preferably) or excel for all plots.

A2-m rigid tank initially contains saturated water vapor at 100 kpa. the tank is connected to a supply line through a valve. steam is flowing in the supply line at 600 kpa and 300 c. the valve is opened, and steam is allowed to enter the tank until the pressure in the tank reaches the line pressure, at which point the valve is closed. a thermometer placed in the tank indicates that the temperature at the final state is 200°c. determine (a) the mass of steam that has entered the tank (b) the amount of heat transfer.