initial commit / add all books

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diff --git a/2123/CH6/EX6.16/Exa_6_16.sce b/2123/CH6/EX6.16/Exa_6_16.sce
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+//Example No. 6.16

+clc;

+clear;

+close;

+format('v',7);

+

+//Given Data : 

+P=6;//pole

+f=50;//Hz

+S=0.04;//slip

+Ton=40;//N-m

+Toff=30;//N-m

+t_onBYt_off=1;

+disp("Part(a) : ");

+Ns=2*f/P*60;//rpm

+N=Ns*(1-S);//rpm

+Tavg=(Ton+Toff)/2;//N-m

+disp(Tavg,"Average torque in N-m : ");

+Navg=sqrt((N^2)*Tavg/Ton);//rpm

+disp(Navg,"Average speed in rpm : ");

+disp("Part(b) : ");

+N1=800;//rpm

+T=Ton*(N1/N)^2;//N-m

+Tavg=32;//N-m

+//Tavg=32=(Ton*t_on+T*t_off)/(t_on+t_off);//N-m

+tonBYtoff=(T-Tavg)/(Tavg-Ton);//

+disp(tonBYtoff,"Ratio ton/toff is : ");