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+// Scilab code Ex7.8: Pg:295 (2008)

+clc;clear;

+c = 3e+08;    // Velocity of light, m/s

+e = 1.6e-019;    // Charge of an electron, coulomb

+B = 0.5;    // Maximum magnetic field at the electron orbit, Weber per meter square

+D = 1.5;    // Diameter of the orbit, meter 

+R = D/2;    // Radius of the orbit, meter

+omega = 50;    // frequency of alternating current through electromagnetic coils, Hz

+N = c/(4*2*%pi*omega*R);    // Number of revolutions

+E = B*e*R*c/1.6e-013;    // Final energy of the electrons, MeV

+E_av = (E*1e+06)/N;    // Average energy per revolution, eV

+printf("\nThe energy per revolution of the electron = %4.1f eV ", E);

+printf("\nThe average energy of electron = %3.0f eV ", E_av);

+

+// Result 

+// The energy per revolution of the electron = 112.5 eV 

+// The average energy of electron = 353 eV 

+// The answer is given wrong in the textbook
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