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+// Exa 5.8
+
+clc;
+clear;
+
+// Given
+
+Va = 2000; // Anode voltage(Volts)
+Vd = 100; // Deflecting plates volage(Volts)
+a =1.5*10^-2; // axial length in m
+Sd= 30*10^-2; // screen distance in m
+Ld = 5*10^-2; // deflecting plates length in m
+
+// Solution
+
+// Let,
+ x = 1.76*10^11 ; // e/m ratio in c/kg
+L = Sd + Ld/2 ;
+D = (Ld*L*Vd)/(2*a*Va) ; // Deflection produced(m)
+Vo = sqrt(2*x*Va); // velocity of electrons in m/kg
+
+
+printf(' The deflection produced on screen = %.3f cm \n',D*100);
+printf('  The velocity of the electrons when they enter the field of the deflecting plates = %.4f * 10^7 m/kg \n', Vo/10^7);
+
+// The answer provided in the textbook is wrong