| ⇦ | 
| ⇨ |
An electron in the hydrogen atom jumps from excited state n to the ground state. The wavelength so emitted illuminates a photosensitive material having work function 2.75 eV. If the stopping potential of the photoelectron is 10 V, the value of n is
Options
(a) 3
(b) 4
(c) 5
(d) 2
Correct Answer:
4
Explanation:
KEₘₐₓ = 10 eV ? = 2.75 eV
Total incident energy
E = ? + KEₘₐₓ = 12.75 eV
Energy is released when electron jumps from the excited state n to the ground state.
E₄ – E₁ = {-0.85 – (-13.6) eV}
= 12.75 eV value of n = 4.
Related Questions: - The voltage of an a.c.supply varies with time (t) as V=120 sin 100 πt the maximum voltage
- Two radioactive materials X₁ and X₂ have decay constants 5λ and λ respectively
- The rate of increase of thermo-e.m.f. with temperature at the neutral temperature
- Three capacitors each of capacitance C and of breakdown voltage V are joined in series
- A capacitor is charged to 200 volt. It has a charge of 0.1 coulomb.
Topics: Atoms and Nuclei
(136)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The voltage of an a.c.supply varies with time (t) as V=120 sin 100 πt the maximum voltage
- Two radioactive materials X₁ and X₂ have decay constants 5λ and λ respectively
- The rate of increase of thermo-e.m.f. with temperature at the neutral temperature
- Three capacitors each of capacitance C and of breakdown voltage V are joined in series
- A capacitor is charged to 200 volt. It has a charge of 0.1 coulomb.
Topics: Atoms and Nuclei (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply