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clc;
e=-1.6*10^-19; //charge on electron in Coulomb
q=20*10^-6; //charge in Coulomb
r1=0.1; //r1 in m
r2=0.05; //r2 in m
Va=9*10^9*(q/r1); //calculating voltage at A
Vb=9*10^9*(q/r2); //calculating voltage at B
V=Va-Vb; //potential difference
W=V*e; //calculating work done in joule
disp(W,"Work done to take the electron from A to B in Joule = "); //displaying result
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