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//chapter 2
//Prad=80*(pi)^2*(dl/lambda)*(Irms)^2;
printf("\n");
frequency=100*10^6;
lamda=(3*10^8)/(100*10^6);//lamda=c/f;
printf("the wavelength is %dm",lamda);
Prad=100;
printf("\nthe Radiated power is %dW",Prad);
dl=0.01;
printf("\nthe elemental length is %gm",dl);
Irms2=(3/0.01)^2*100/(80*(%pi)^2);
Irms=sqrt(Irms2);
printf("\nthe Irms current is %gA",Irms)
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