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+// Scilab code Exa4.8 : : Page-179 (2011)

+clc; clear; 

+A = 1.5e-4;           // Area of capacitor plates, square metre

+K = 12;               // Dielectric constant

+D = K*8.8542e-012;   // Electrical permittivity of the medium, per newton-metre-square coulomb square

+x = 50e-06;           // Width of depletion layer, metre

+C = A*D/x*10^12;      // Capacitance of the silicon detector, pF

+E = 4.5e+06;          // Energy produced by the ion pairs, eV

+N = E/3.5;            // Number of ion pairs

+e = 1.60218e-019;     // Charge of each ion, coulomb

+Q = N*e;              // Total charge, coulomb

+V = Q/C*10^12;        //  Potential applied across the capacitor, volt

+printf("\nThe capacitance of the detector : %6.2f pF\nThe potential applied across the capacitor : %4.2e volt", C, V);

+

+// Result

+// The capacitance of the detector : 318.75 pF

+// The potential applied across the capacitor : 6.46e-004 volt