Igcse Model Questions Vol1 2021 Physics Question 29

Practice objective / multiple choice question 29 from the 2021 Igcse Model Questions Vol1 Physics examination.

Igcse Model Questions Vol1 2021 Physics Objective / Multiple Choice Hard Difficulty
Question 29 IGCSE_MODEL_QUESTIONS_VOL1 • 2021 • PHYSICS • objective

An electron in a hydrogen atom drops from the \(n=5\) to the \(n=2\) energy level, emitting a photon. The photon is then used to eject an electron from a metal whose work function is \(2.0\,\text{eV}\). (a) Find the maximum kinetic energy of the ejected electron in joules. (b) Calculate the radius of the electron's orbit in the \(n=5\) state, given the Bohr radius \(a_0 = 5.29\times10^{-11}\,\text{m}\).

Answer Options

Correct Answer A. K_{max}=1.37×10^{-19} J; r_5=1.32×10^{-9} m
B. K_{max}=1.37×10^{-18} J; r_5=1.32×10^{-10} m
C. K_{max}=1.50×10^{-19} J; r_5=1.10×10^{-9} m
D. K_{max}=1.20×10^{-19} J; r_5=1.45×10^{-9} m
Correct Answer
A
Correct Option:
K_{max}=1.37×10^{-19} J; r_5=1.32×10^{-9} m

About This Question

This is Igcse Model Questions Vol1 2021 Physics Question 29. It is one of the objective questions from the 2021 Igcse Model Questions Vol1 Physics examination.

Difficulty level: Hard .

View More Igcse Model Questions Vol1 2021 Physics Questions More Igcse Model Questions Vol1 Practice Questions Back to Questions

Master the Exam!

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows
Chat with Support