Unit Test 1 Physics PDF - VSPM Academy Winter 2024

# VSPM Academy of Higher Education ## ARVINDBABU DESHMUKH MAHAVIDYALAYA, BHARSINGI, DIST- NAGPUR. ### B.Sc.-T. Y (Sem-V) Winter-2024 **Subject: Physics Paper-I** **Unit Test-1** **[Maximum Marks-20]** 1. Bhor's theory could not explain * (a) Zeeman effect * (b) Intensity of different...

# VSPM Academy of Higher Education ## ARVINDBABU DESHMUKH MAHAVIDYALAYA, BHARSINGI, DIST- NAGPUR. ### B.Sc.-T. Y (Sem-V) Winter-2024 **Subject: Physics Paper-I** **Unit Test-1** **[Maximum Marks-20]** 1. Bhor's theory could not explain * (a) Zeeman effect * (b) Intensity of different spectral lines of an atom * (c) Both a and b * (d) None of the above 2. Bhor's theory of atomic structure is an application of...quantum theory to ..... model * (a) Planck's, Rutherford atom * (b) Planck's, Sommerfeld atom * (c) Planck's, Plum pudding atom * (d) Planck's, Thomson's atom 3. Vector model atom is based on * (a) Space quantization & Spin of neutron * (b) Space quantization & Spin of electron * (c) Space quantization & Spin of proton * (d) Space quantization & Spin of atom 4. What will be the energy of hydrogen atom if n=2? * (a) -13.6eV * (b) -13.6eV / 1 * (c) -13.6eV / 4 * (d) -13.6eV / 16 5. The splitting of energy levels of an atom in a uniform external electric field E is called as * (a) Zeeman effect * (b) Stark effect * (c) hall effect * (d) Raman effect 6. What will be the value of total quantum number j for the f-electron according to vector model atom? * (a) j=7/2 and 5/2 * (b) j=5/4 and 7/2 * (c) j=2/3 and 5/2 * (d) j=5/3 and 7/2 7. For two electron system if l=3 and s=2. Then what will be the total orbital quantum number? * (a) 5,4,3,2,1 * (b) 7,6,5,4,3,2,1 * (c) 3,2,1 * (d) 6,5,4,3,2,1 8. What will be the total no of electron in an atom of n=3? * (a) 8 * (b) 6 * (c) 18 * (d) 32 9. In Bohr's model of an atom which of the following is an integral multiple of h/2π? * (a) Kinetic energy * (b) Radius of an atom * (c) Potential energy * (d) Angular momentum 10. The transition of electron from n = 4, 5, 6, ....... ton 3 corresponds to * (a) Lyman series * (b) Balmer series * (c) Paschen series * (d) Brackett series 11. What does the conductivity of metals depend upon? * (a) The nature of material * (b) Number of free electrons * (c) Resistance of the metal * (d) Number of electrons 12. Thermal conductivity is due to free electron? * (a) True * (b) False 13. Fermi temperature is defined as ratio of * (a) Boltzmann constant to fermi energy * (b) Fermi energy to Boltzmann constant * (c) Fermi energy to absolute temperature * (d) Fermi energy to Planck constant 14. In insulator, the conduction band and valence band overlap each other * (a) True * (b) False 15. Which of the following is good insulator? * (a) Diamond * (b) Gold * (c) Copper * (d) Silver 16. The conductivity of semiconductor depends upon temperature * (a) True * (b) False 17. In the Hall Effect, the directions of electric field and magnetic field are parallel to each other. * (a) True * (b) False 18. Calculate the hall voltage when the Electric Field is 5V/m and height of the semiconductor is 2cm. * (a) 10V * (b) 1V * (c) 0.1V * (d) 0.01V 19. Exactly what is a "hole” in semiconductor terminology? * (a) Another name for a positron. * (b) A fictitious particle that is really just an empty state in a nearly filled band * (c) A fictitious particle that is really just an empty state in a nearly empty band * (d) An H+ ion 20. At equilibrium Lorentz forces will be ______ of Hall Effect force. * (a) Double * (b) Half * (c) Equal * (d) No proportionality