Waec Model Questions Vol1 2019 Physics Question 44

Practice objective / multiple choice question 44 from the 2019 Waec Model Questions Vol1 Physics examination.

Waec Model Questions Vol1 2019 Physics Objective / Multiple Choice Hard Difficulty
Question 44 WAEC_MODEL_QUESTIONS_VOL1 • 2019 • PHYSICS • objective

An electron in a hydrogen atom makes a transition from the n = 5 level to the n = 2 level, emitting a photon. The photon is then used in a photoelectric experiment on a metal whose work function is 2.0 eV. Determine (a) the wavelength of the emitted photon, (b) the maximum kinetic energy of the emitted electrons, and (c) the stopping potential required to halt these electrons.

Answer Options

A. λ = 410 nm; K_max = 0.78 eV; stopping potential = 0.78 V
B. λ = 500 nm; K_max = 1.10 eV; stopping potential = 1.10 V
Correct Answer C. λ = 434 nm; K_max = 0.856 eV; stopping potential = 0.86 V
D. λ = 460 nm; K_max = 0.92 eV; stopping potential = 0.92 V
Correct Answer
C
Correct Option:
λ = 434 nm; K_max = 0.856 eV; stopping potential = 0.86 V

About This Question

This is Waec Model Questions Vol1 2019 Physics Question 44. It is one of the objective questions from the 2019 Waec Model Questions Vol1 Physics examination.

Difficulty level: Hard .

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