The electrons in conduction band are free to___________________?
Correct answer: C. Transport charge
- A. Transport vibrations
- B. Transport signals
- C. Transport charge
- D. Transport impulses
Explanation
Conduction-band electrons have enough energy to move through the solid, so they carry electric charge and produce current. The likely alternative is “transport signals,” but signals may be carried by changing charge, whereas the electrons themselves transport charge.
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About Quantum Theory and Radiation
Quantum theory treats electromagnetic radiation as packets of energy called photons, with energy proportional to frequency through E equals hf. The topic covers Planck's hypothesis, photon momentum, the photoelectric effect, threshold frequency, work function and wave particle duality, distinguishing quantised energy exchange from classical continuous radiation.
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