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+// example:-2.2.page no.-26.

+// progarm to find out skin depth of aluminium,copper,gold and silver at frequency 10GHZ.

+f=10*10^9;

+muo=4*%pi*10^-7;  // permeability in free space.

+omega=2*%pi*f;

+sigma_aluminium=3.816*10^7;

+sigma_copper=5.813*10^7;

+sigma_gold=4.098*10^7;

+sigma_silver=6.173*10^7;

+delta1=sqrt(2/(omega*muo*sigma_aluminium));

+delta2=sqrt(2/(omega*muo*sigma_copper));

+delta3=sqrt(2/(omega*muo*sigma_gold));

+delta4=sqrt(2/(omega*muo*sigma_silver));

+//result

+disp(delta1,'skin depth of aluminium in meter=')  // skin depth of aluminium.

+disp(delta2,'skin depth of copper in meter=')  //skin depth of copper.

+disp(delta3,'skin depth of gold in meter=')  //skin depth of gold.

+disp(delta4,'skin depth of silver in meter=')  //skin depth of silver.
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