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// Exa 13.7
clc;
clear all;
// Given data
// Refering circuit in fig. 13.7(a) and graph in fig.13.7(b) on page no.422
I=10; // mA
V=30;// Volts
Illumination=400;// in l/m^2
// Solution
disp(" From graph(13.7(b) , cell resistance at 400 l/m^2 is 1 K ohms");
Rcell=1; // K ohms
R1=V/I - Rcell; //Required series resistance
Rdark=100;//Cells dark resistance in K ohms
Idark=V/(R1+Rdark); // Dark current
printf(' The required series resistance and dark current level are %d K ohms amd %.1f mA respectively \n',R1,Idark);
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