Solve for R and then for
A solar cell generates a potential difference of 0.10 V when a 500 resistor is connected across it, and a potential difference of 0.15 V when a 1000 is substituted. What are the (a) internal resistance and (b)emf of the solar cell? (c) The area of the cell is 5.0 , and the rate per unit area at which it receives energy from light is 2.0 . What is the efficiency of the cell for converting light energy to thermal energy in the 1000 external resistor?