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+//Caption:Calculate (i)-dc electron velocity,(ii)-dc phase constant, (iii)-plasma frequency, (iv)-reduced plasma frequency for R=0.5, (v)-dc beam current beam density, (vi)-instantaneous beam current density

+//Exa:8.11

+clc;

+clear;

+close;

+V_o=20*10^3;//in volts

+I_o=2;//in A

+f=10*10^9;//in Hz

+p_o=10^-6;//in c/m^3

+p=10^-8;//in c/m^3

+v=10^5;//in m/s

+R=0.5;

+v_o=0.593*10^6*sqrt(V_o);

+k=2*%pi*f/v_o;

+w_p=[1.759*10^11*(10^-6/(8.854*10^-12))]^0.5;

+w_q=R*w_p;

+J_o=p_o*v_o;

+J=p*v_o-p_o*v;

+disp(v_o,'Dc electron velocity (in m/s) =');

+disp(k,'Dc phase constant (in rad/s) =');

+disp(w_p,'Plasma frequency (in rad/s) =');

+disp(w_q,'Reduced plasma frequency (in rad/s) =');

+disp(J_o,'Dc beam current density (in A/sq. m) =');

+disp(J,'Instantaneous beam current density(in A/sq. m) =');
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