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+// Exa 5.10
+
+clc;
+clear;
+ 
+// Given
+
+Va = 2000; // voltage applied to anodes(V)
+l = 50*10^-3; // length of horizontal plates(m)
+m = 9.1*10^-31; // mass of electron in kg
+e = 1.6*10^-19; // velocity of electron in m/s
+// Max transit time is T/4
+
+// Solution
+
+V = sqrt(2*Va*e/m);
+Fc = V/(4*l);
+printf(' The velocity of electron = %.3f * 10^8 m/s \n',V*10^-8);
+printf('  The cutoff frequency = %.3f MHz \n',Fc/10^6);