CBSE Physics Atomic Physics Test Online Mcqs Question Online
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CBSE Physics Atomic Physics Test Online

Test Name Atomic and Nuclear Physics Test
Subject CBSE Physics
Test Type MCQs
Total Question 27
Total Marks 54
Total Time 25 Minutes
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CBSE (Central Board of Secondary Education) conducts all India examinations for all classes. Science subject Physics basic topic Atomic and Nuclear Physics essential for all nuclear engineers studies. Our test based on knowledge of atomic and nuclear physics so must take before appear in examinations, classes test.

CBSE Physics Atomic Physics Test Online


1. In a Rutherford scattering experiment when a projectile of charge Z1 and mass M1 approaches a target nucleus of charge Z2 and mass M2 the distance of closest approach is r°. This energy of the projectile is ?

Question 1 of 27

2. Energy E of a hydrogen atom with principal quantum number n is given by E = -13.6/n2 eV. The energy of a photon ejected when the electron jumps from n = 3 state to n = 2 state of hydrogen, is approximately ?

Question 2 of 27

3. The ionisation energy of hydrogen atom is 13.6. Following Bohr's theory, the energy corresponding to a transition between 3rd and 4th orbit is ?

Question 3 of 27

4. In Rutherford scattering experiment, what will be the correct angle for a α-scattering for an impact parameter, b = 0 ?

Question 4 of 27

5. The ground state energy of hydrogen atom is -13.6 eV. When its electron is in the first excited state, its excitation energy is ?

Question 5 of 27

6. When hydrogen atom is in its excited level its radius is ?

Question 6 of 27

7. Consider an electron in the nth orbit of a hydrogen atom in the Bohr model. The circumference of the orbit can be expressed in terms of de-Broglie wavelength λ of that electron as ?

Question 7 of 27

8. The total energy of electron in the ground state of hydrogen atom is -13.6 eV. The kinetic energy of an electron in the first excited state is ?

Question 8 of 27

9. When a hydrogen atom is raised from the ground state to an excited state ?

Question 9 of 27

10. Energy A, B, C, of a certain atom correspond to increasing values of energy ei, EA < EB< EC. If λ1, λ2, λ3 are the wavelengths of radiation corresponding to the transitions C to B, B to A and C to A respectively, which of the following relation is correct ?

Question 10 of 27

11. When electron jumps form n = 4 to n = 2 orbit, we get ?

Question 11 of 27

12. In terms of Bohr radius α°, the radius of the second Bohr orbit of a hydrogen atom is given by ?

Question 12 of 27

13. Which of the following transitions gives photon of maximum energy ?

Question 13 of 27

14. To explain his theory, Bohr used ?

Question 14 of 27

15. The valence electron in alkali metal is a ?

Question 15 of 27

16. Ionization potential of hydrogen atom is 13.6 eV. Hydrogen atoms in the ground state are excited by monochromatic radiation of photon energy 12.1 eV. According to Bohr's theory, the spectral lines emitted by hydrogen will be ?

Question 16 of 27

17. The spectrum obtained form a sodium vapour lamp is an example of ?

Question 17 of 27

18. Bohr model of atoms ?

Question 18 of 27

19. The ionization energy of the electron in the hydrogen atom in its ground state is 13.6 eV. The emit radiations of 6 wavelength. Maximum wavelength of emitted radiation corresponds to the transition between ?

Question 19 of 27

20. The radius of hydrogen atom is its ground state is 5.3 x 10-11 m. After collision with an electron it is found to have a radi7us of 21.2 x 10-11m. What is the principal quantum number n of the final state of the atom ?

Question 20 of 27

21. Hydrogen atoms are excited from ground state of the principle quantum number 4. Then the number of spectral lines observed will be ?

Question 21 of 27

22. The ionisation energy of hydrogen atom is 13.6 eV, the ionisation energy of helium atom would be ?

Question 22 of 27

23. The energy of ground electronic state of hydrogen atom is -13.6 eV. The energy of the first excited state will be ?

Question 23 of 27

24. The total energy of an electron is the first excited state of hydrogen is about - 3.4 eV. Its kinetic energy in this state is ?

Question 24 of 27

25. The ground state energy of H-atom is 13.6 eV. The energy needed to ionize H-atom from its second exited state ?

Question 25 of 27

26. Which source is associated with a line emission spectrum ?

Question 26 of 27

27. In the Bohr's model of a hydrogen atom, the centripetal force is furnished by the Coulomb attraction between  the proton and the electron. If α°is the radius of the ground state orbit, m is the mass and e is the charge on the electron, ε° is the vacuum permittivity, the speed of the electron is ?

Question 27 of 27


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