Question
(a) To what temperature must you raise a copper wire, originally at $20.0^\circ\textrm{C}$ , to double its resistance, neglecting any changes in dimensions? (b) Does this happen in household wiring under ordinary circumstances?

a) $280^\circ\textrm{C}$

b) This does not normally happen in household wiring. Circuit breakers are meant to interrupt the circuit before temperatures like this would be reached.

Solution Video