<Dl> <Dd> f (\ displaystyle \ quad f) = frequency . </Dd> <Dd> ω (\ displaystyle \ quad \ omega) = angular frequency = 2πf . </Dd> <Dd> σ c (\ displaystyle \ quad \ sigma _ (c)) = conductivity of annealed copper = 5.96 x 10 S / m . </Dd> <Dd> σ r (\ displaystyle \ quad \ sigma _ (r)) = conductivity of the material relative to the conductivity of copper . For hard drawn copper σ r (\ displaystyle \ sigma _ (r)) may be as low as 0.97 . </Dd> <Dd> σ (\ displaystyle \ quad \ sigma) = σ r σ c (\ displaystyle \ sigma _ (r) \ sigma _ (c)). </Dd> </Dl> <Dd> f (\ displaystyle \ quad f) = frequency . </Dd> <Dd> ω (\ displaystyle \ quad \ omega) = angular frequency = 2πf . </Dd> <Dd> σ c (\ displaystyle \ quad \ sigma _ (c)) = conductivity of annealed copper = 5.96 x 10 S / m . </Dd>

How fast do electrons move through a copper wire