Neco Model Questions Vol1 2018 Physics Question 48
Practice objective / multiple choice question 48 from the 2018 Neco Model Questions Vol1 Physics examination.
For a hydrogen‑like ion He\(^+\) (\(Z = 2\)), an electron makes a transition from the \(n = 4\) level to the \(n = 2\) level and then from \(n = 2\) to the ground state \(n = 1\). (i) Calculate the total energy released in the two transitions (in electron‑volts). (ii) Find the wavelength of the photon emitted in the second transition (in nanometres). (iii) Using the Bohr model, compute the speed of the electron while it is in the \(n = 2\) orbit (in \(\text{m s}^{-1}\)).
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About This Question
This is Neco Model Questions Vol1 2018 Physics Question 48. It is one of the objective questions from the 2018 Neco Model Questions Vol1 Physics examination.
Difficulty level: Hard .
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