+2 Physics Unit 8 - Nuclear Physics

19 Questions

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+2 Physics Unit 8 - Nuclear Physics

Prepared by P. ILAIYARAJA M. Sc. ,B. Ed. , PG ASST IN PHYSICS , GHSS, PANCHANATHIKKULAM EAST, NAGAI DT.   ; &www. Padasalai. Net


Questions and Answers
  • 1. 
    The nuclear radius of nucleus is
    • A. 

      (2)

    • B. 

      (1)

    • C. 

      (3)

    • D. 

      (4)

  • 2. 
    The nuclei are example of
    • A. 

      Isotones

    • B. 

      Isomers

    • C. 

      Isotopes

    • D. 

      isobars

  • 3. 
    The mass defect of a certain nucleus is found to be 0.03 amu. Its binding energy is
    • A. 

      27.93 MeV

    • B. 

      27.93 eV

    • C. 

      27.93 GeV

    • D. 

      27.93 KeV

  • 4. 
    Nuclear fission can be explained by
    • A. 

      Liquid drop model

    • B. 

      Quark model

    • C. 

      Shell model

    • D. 

      Bohr atom model

  • 5. 
    The nucleons in a nucleus are attracted by
    • A. 

      Nuclear force

    • B. 

      Magnetic force

    • C. 

      Gravitational force

    • D. 

      Electrostatic force

  • 6. 
    The ionisation power is maximum for
    • A. 

      α – particles

    • B. 

      γ – rays

    • C. 

      β − particles

    • D. 

      Neutrons

  • 7. 
    The half life period of a certain radioactive element with disintegration constant 0.0693 per day is
    • A. 

      10 days

    • B. 

      14 days

    • C. 

      140 days

    • D. 

      1.4 days

  • 8. 
    The radio-isotope used in agriculture is
    • A. 

      (2)

    • B. 

      (3)

    • C. 

      (4)

    • D. 

      (1)

  • 9. 
    The average energy released per fission is
    • A. 

      200 MeV

    • B. 

      200 meV

    • C. 

      200 GeV

    • D. 

      200 eV

  • 10. 
    The explosion of atom bomb is based on the principle of
    • A. 

      uncontrolled fission reaction

    • B. 

      Controlled fission reaction

    • C. 

      Fusion reaction

    • D. 

      Thermonuclear reaction

  • 11. 
    Anaemia can be diagnosed by
    • A. 

      (3)

    • B. 

      (2)

    • C. 

      (1)

    • D. 

      (4)

  • 12. 
    In the nuclear reaction ,  X-stands for
    • A. 

      Neutron

    • B. 

      Proton

    • C. 

      Electron

    • D. 

      Deutron

  • 13. 
    In β – decay
    • A. 

      Neutron number decreases by one

    • B. 

      Atomic number decreases by one

    • C. 

      mass number decreases by one

    • D. 

      Proton number remains the same

  • 14. 
    Isotopes have
    • A. 

      Same proton number but different neutron number

    • B. 

      Same proton number and neutron number

    • C. 

      Same mass number but different atomic number

    • D. 

      Same neutron number but different proton number

  • 15. 
    The time taken by the radioactive element to reduce to 1/e times is
    • A. 

      Mean life

    • B. 

      Half life/2

    • C. 

      Half life

    • D. 

      Twice the mean life

  • 16. 
    The half life period of is 10.1 minute. Its life time is
    • A. 

      (4)

    • B. 

      (3)

    • C. 

      (2)

    • D. 

      (1)

  • 17. 
    Positive rays of the same element produce two different traces in a Bainbridge mass spectrometer. The positive ions have
    • A. 

      Different mass with same velocity

    • B. 

      Different mass with different velocity

    • C. 

      Same mass with same velocity

    • D. 

      Same mass with different velocity

  • 18. 
    The binding energy of  nucleus is
    • A. 

      493 MeV

    • B. 

      8.8 MeV

    • C. 

      88 MeV

    • D. 

      41.3 MeV

  • 19. 
    The ratio of nuclear density to the density of mercury is about
    • A. 

      (3)

    • B. 

      (2)

    • C. 

      (4)

    • D. 

      (1)