Final answer:
In room temperature nichrome, electron mobility decreases with temperature due to increased atomic vibrations causing more scattering of electrons. The correct option is B.
Step-by-step explanation:
The electron mobility in room temperature nichrome decreases with temperature. In nichrome, and most other metals, the resistivity increases with increasing temperature. This is because the increased temperature causes more vibrations of the atoms in the metal's lattice structure, making it more difficult for electrons to move through the material. Therefore, as the temperature increases, the electron mobility tends to decrease due to increased scattering of the electrons by the vibrating atoms.
The electron mobility in room temperature nichrome decreases with temperature. In most conducting metals, including nichrome, the resistivity increases with increasing temperature. This is because the increasing temperature causes increased vibrations of the atoms in the lattice structure of the metal, which impede the motion of the electrons.