Recent content by mikey23

  1. M

    Resistance and Resistivity of tungsten wire

    A= Pi x radius^2 so 3.14x(.075mm)^2= 17.67x10^-9 m^2 T= 1320-20=1300 C P= (Resistivity)[1+(coefficiant of resistivity)(T)] p= (56x10^-9)[1+(4.5x10^-3)(1300)] = 383.6x10^-9 L=80(17.67x10^-9)/(383.6x10^-9)=3.685m long This seems intuitively long to me, so if the resistivity figure is...