initial commit / add all books

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+                                   //EXAMPLE 1-4       PG NO 18-19

+R1=2.22;                       //RESISTANCE

+R2=0.6;                        //RESISTANCE

+R3=3;                          //Resistance

+R4=4;

+R5=5;

+R6=6;

+R7=2;

+R=R1+R2+R3;

+disp('i) Resistance (R) is    =  '+string ([R]) +' ohm  ');

+V=12;                              //VOLTAGE

+I=V/R;                              //Current

+disp('ii) CURRENT (I) is    =  '+string ([I]) +' A  ');

+I3=I;                                                 //CURRENT THROUGH 3 ohm RESISTANCE

+disp('iii) CURRENT (I3) is    =  '+string ([I3]) +' A  ');

+I5=(I3*R4)/(R4+R5);                                      //CURRENT THROUGH 5 ohm RESISTANCE

+disp('iv) CURRENT (I5)  is    =  '+string ([I5]) +' A  ');

+I4=(I3*R5)/(R4+R5);                                  //CURRENT THROUGH 4 ohm RESISTANCE

+disp('v) CURRENT (I4)  is    =  '+string ([I4]) +' A  ');

+V1=1.236;                                    //VOLTAGE ACROSS THREE PARALLEL RESISTANCE 

+I2=V1/R7;                                         //current

+disp('vi) CURRENT (I2)  is    =  '+string ([I2]) +' A  ');

+I1=V1;                                               //CURRENT THROUGH 1 ohm RESISTANCE

+disp('iv) CURRENT (I1)  is    =  '+string ([I1]) +' A  ');

+I6=V1/R6;                                            //CURRENT THROUGH 6 ohm RESISTANCE

+disp('vii) CURRENT (I6)  is    =  '+string ([I6]) +' A  ');