consider the following experimentally measured current outputs at different forward bias voltages applied to a si solar cell irradiated with sunlight: v (v) i (a) 0.75 0 0.6 -0.14 0.5 -0.42 0.4 -0.65 0.3 -1.27 0.1 -2.8 (a) at which applied voltage is the power output of the cell maximized? (b) if you use a different solar cell material with a narrower band gap than si (egsi