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+//pagenumber 109 example 14

+clear

+voltag=40;//volt

+i1=0.2;//ampere

+c1=40*10^-6;//farad

+c2=c1;

+induct=2;//henry

+//(1) ripple

+vdc=2*sqrt(2)*voltag/3.14;

+r1=vdc/i1;

+induc1=r1/1130;

+v1=voltag/(3*3.14^3*120^2*4*induct*c1);

+disp("ripple voltage   =   "+string((v1))+"volt");

+//(2) with two filter

+v1=4*voltag/((3*3.14^5)*(16*120^2*induct^2*c1^2));

+disp("ripple voltage including filters   =   "+string((v1))+"volt");//correction in the book

+//(3)ripple voltage

+v1=4*voltag/(5*3.14*1.414*2*3.14*240*240*3.14*induct*c1);

+v1=v1/20;

+disp("ripple voltage   =   "+string((v1))+"volt");