The dark current density for a silicon solar cell at 40°C is 1.8e-8 A/m^2 and the short circuit current density is 200 A/m^2 . Calculate the following:

a. Open circuit voltage
b. voltage at maximum power
c. Current density at maximum power
d. maximum power/m^2
e. maximum efficiency
f. the cell area required for an output of 25W when exposed to irradiance=900W/m^2

Agas contained within a piston-cylinder assembly e end nation about same energy states, 1 and 2, where pi 10 bar, v undergoes two processes, a and b, between the sam 0.1 m3, ui-400 kj and p2 1 bar, v2 1.0 m2, u2 200 kj: process a: process from 1 to 2 during which the pressure- volume relation is pv constant process b: constant-volume process from state 1 to a pressure of 2 bar, followed by a linear pressure-volume process to +20 0 state 2 kinetic and potential energy effects can be ignored. for each of the processes a and b, (a) sketch the process on p-v coordinates, (b) evaluate the work, in kj, and (c) evaluate process the heat transfer, in kj