Changes

<math>R=\frac{L\rho}{A}</math>

<math>R=\frac{L\rho}{A}</math>

where L is the length of the object, and A is its cross sectional area. <math>\rho</math> is the resistivity of the material the object, a measure of how much the free electrons in a material are scattered by the ion lattice.   

where <math>L</math> is the length of the object, and <math>A</math> is its cross sectional area. <math>\rho</math> is the resistivity of the material the object, a measure of how much the free electrons in a material are scattered by the ion lattice.   

Resistance in a circuit made of purely resistive elements (i.e. no [[inductor]]s or [[capacitor]]s) can be calculated by the [[voltage]] divided by the [[current]] (R = V / I).

Resistance in a circuit made of purely resistive elements (i.e. no [[inductor]]s or [[capacitor]]s) can be calculated by the [[voltage]] divided by the [[current]]:

 

<math>R = \frac{V}{I}</math>

==See also==

==See also==