An electron has charge (e) and mass (m). A proton has charge e and mass 1840m. A "Proton volt" is equal to:
Correct answer: A. A
- A. A
- B. B
- C. C
- D. D
Explanation
The problem defines a "Proton volt" as the energy gained by a proton (charge qp =+e) when it moves through an electric potential difference of 1 volt (ΔV=1 V).1 Proton volt=(charge of proton)×(1 V)=1eV.
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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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