Question
(a) Of what material is a wire made, if it is 25.0 m long with a 0.100 mm diameter and has a resistance of $77.7 \Omega$ at $20.0^\circ\textrm{C}$ ? (b) What is its resistance at $150^\circ\textrm{C}$?

a) Gold

b) $110\Omega$

Solution Video