[" (4) Requator than pole "," equipment from the "],[" equator than pole "," equipment from the "],[" becomes "," For protecting a sensitive should be "],[" an atom of "," (1) Surrounded with fine copper sheet "],[" material and "," (1) Wrapped with insulation around it when "],[" relims) "-2005]," (3) Wrapped with insulation around it when "],[" relims) "-2005]," passing current through it "],[" and "mu_(f)!=0," (4) Placed inside an aluminium can "],[" and "mu_(p)=0," Pusa Road,New Dehi- "110005" Ph."011-47623456],[" and "mu_(p)=0]