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+//Caption:Calculate (i)-breakdown voltage ,(ii)-breakdown electric field.
+//Exa:9.11
+clc;
+clear;
+close;
+E_r=11.8;
+E_o=8.85*10^-12;
+N=3*10^21;//in per cubic meter
+L=6.2*10^-6;//in meter
+q=1.6*10^-19;//in coulombs
+V_bd=q*N*L^2/(E_o*E_r);
+E_bd=V_bd/L;
+disp(V_bd,'Breakdown voltage (in volts) =');
+disp(E_bd,'Breakdown electric field (in V/m) =');
+\ No newline at end of file