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← ScienceWhen electron's de Broglie wavelength approaches width of conductor which mechanism causes measurable resistance increase?
A)Quantum confinement effects✓
B)Increased electron-phonon scattering
C)Reduced electron-electron interactions
D)Enhanced surface plasmon resonance
💡 Explanation
When the de Broglie wavelength approaches the conductor width, quantum confinement effects occur because the electron's momentum becomes quantized, leading to discrete energy levels and increased scattering at boundaries. Therefore, resistance increases, rather than effects which depend on temperature or interactions with other free electrons.
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