Gce Model Questions Vol1 2021 Physics Question 12

Practice objective / multiple choice question 12 from the 2021 Gce Model Questions Vol1 Physics examination.

Gce Model Questions Vol1 2021 Physics Objective / Multiple Choice Hard Difficulty
Question 12 GCE_MODEL_QUESTIONS_VOL1 • 2021 • PHYSICS • objective

A hydrogen atom makes a transition from the n = 5 level to the n = 2 level, emitting a photon. The photon is then incident on a metal surface whose work function is 2.0 eV. (i) Calculate the wavelength of the emitted photon. (ii) Determine the stopping potential required to just stop the electrons emitted from the metal by this photon.

Answer Options

A. λ = 3.78×10⁻⁷ m, V_stop = 0.72 V
B. λ = 4.90×10⁻⁷ m, V_stop = 0.95 V
Correct Answer C. λ = 4.34×10⁻⁷ m, V_stop = 0.86 V
D. λ = 5.12×10⁻⁷ m, V_stop = 1.12 V
Correct Answer
C
Correct Option:
λ = 4.34×10⁻⁷ m, V_stop = 0.86 V

About This Question

This is Gce Model Questions Vol1 2021 Physics Question 12. It is one of the objective questions from the 2021 Gce Model Questions Vol1 Physics examination.

Difficulty level: Hard .

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