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+// Example 1.2: Electric field intensity, Voltage
+clc, clear
+l=3e-3; // Length of the bar in metres
+a=50*10*1e-12; // Cross-sectional area in metres square
+I=2e-6; // Current in amperes
+rho=2.3e3; // Resistivity in ohm metres
+E=I*rho/a; // Electric field intensity in volt per metres
+V=E*l; // Voltage across the bar in volt
+disp(E,"Electic field intensity (V/m) = ");
+disp(V,"Voltage across the bar (V) = ");
+\ No newline at end of file