The Resistivity of Nichrome at 20ºC Is 100 $\times$ 10^-8 $\Omega$ · MYou Have Nichrome Wire Whose Diameter Is 2

Multiple Choice

The resistivity of nichrome at 20ºC is 100 $\times$ 10^-8 $\Omega$ · m.You have nichrome wire whose diameter is 2.50 mm and need a resistance of 100 $\Omega$ .How long would a piece of this wire need to be to provide this resistance?

A) 196 m
B) 491 m
C) 543 m
D) 867 m
E) 1.96 km