A copper wire has fixed length and cross-sectional area
PHYSICS · Single correct · AP · Physics 2: Algebra-based · Electric Circuits · Electric Circuits
Problem
A copper wire has fixed length and cross-sectional area. If the free-electron number density inside the wire is doubled while temperature and mobility remain unchanged, its electrical resistance will
(a) become one-half of the original value
(b) remain unchanged
(c) become double the original value
(d) become one-fourth of the original value