initial commit / add all books

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diff --git a/215/CH11/EX11.4/ex11_4.sce b/215/CH11/EX11.4/ex11_4.sce
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+clc

+//Example 11.4

+//Calculate the Average power absorbed and average power supplied by source

+//From figure 11.6

+//By applying mesh analysis

+I1mag=11.18;I1ang=-63.43;I2mag=7.071;I2ang=-45;R=2;Vleft=20;Vright=10;

+//Current through 2 ohm resistor

+printf("I1-I2=%d(%d ang) A \n",5,-90)

+//Average power absorbed by resistor

+PR=0.5*5^2*R

+printf("Average power absorbed by resistor=%d W \n",PR)

+//Power supplied by left source

+Pleft=0.5*Vleft*I1mag*cos(0-I1ang*%pi/180)

+//Power supplied by right source

+Pright=0.5*Vright*I2mag*cos(0+I2ang*%pi/180)

+printf("Power supplied by sources \t Pleft=%d W \t Pright=%3.1f W",Pleft,Pright);

+

+

+

+

+