Gce Model Questions Vol1 2023 Physics Question 33

Practice objective / multiple choice question 33 from the 2023 Gce Model Questions Vol1 Physics examination.

Gce Model Questions Vol1 2023 Physics Objective / Multiple Choice Hard Difficulty
Question 33 GCE_MODEL_QUESTIONS_VOL1 • 2023 • PHYSICS • objective

An electron in a hydrogen atom makes a transition from the \(n=4\) level to the \(n=2\) level, emitting a photon. \(a)\) Calculate the wavelength of the emitted photon (give your answer in nanometres).\n\(b\)\) If this photon strikes a metal whose work function is \(2.0\,\text{eV}\), what is the maximum kinetic energy of the emitted electrons (in electron‑volts)?\n\(c\)\) Suppose instead that the electron in the hydrogen atom is accelerated from rest through a potential difference equal to the energy difference of the transition. Find its final speed (assume non‑relativistic motion).

Answer Options

A. a) 434 nm; b) 1.2 eV; c) 8.2×10^5 m·s⁻¹
B. a) 410 nm; b) 0.80 eV; c) 7.0×10^5 m·s⁻¹
Correct Answer C. a) 486 nm; b) 0.55 eV; c) 9.5×10^5 m·s⁻¹
D. a) 656 nm; b) 0.30 eV; c) 1.1×10^6 m·s⁻¹
Correct Answer
C
Correct Option:
a) 486 nm; b) 0.55 eV; c) 9.5×10^5 m·s⁻¹

About This Question

This is Gce Model Questions Vol1 2023 Physics Question 33. It is one of the objective questions from the 2023 Gce Model Questions Vol1 Physics examination.

Difficulty level: Hard .

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