Refresh your basics (M.Sc Physics)

(do give your responses with your name, RRN, and write question No. and responses by clicking at the comments section below)

1. In the year 1911, the nucleus of an atom was discovered by

                (i) John Dalton  (ii) Rutherford  (iii) Thomson     (v) Chadwick

2. The constituent of nucleus of an atom are

                (i) protons and neutrons              (ii) electrons and protons

                (iii)protons and photons                              (iv)protons and mesons

3. The mass of proton is _________ times that of electrons

                (i)1536  (ii) 2016                (iii) 1876              (iv) 1836

4. A nucleus is considered to be electrically    

                (i) neutral (ii) positive (iii) negative (iv) positive and negative

5. In ³⁵Cl₁₇, the number of protons and neutrons are

                (i) 17 and 19       (ii) 18 and 17 (iii) 17 and 18 (iv) 16 and 19

6. Elements that have same atomic number but different mass number are

                (i) isobars            (ii) isochors        (iii) isotones      (iv) isotopes

7. According to Rutherford's experiment, the size of nucleus is of the order of

                (i) 10^-15 fm           (ii) 1 fm                                (iii)10^-10 m           (iv)10^-6m

8. Isotones are the elements that have same __________ .

                (i) nucleon number        (ii) neutron number (iii) proton number (iv) atomic number

9. Isobars are the elements that have same ______ and different _______ .

                (i)atomic  and mass number       (ii) mass number and atomic number

                (iii)proton and neutron number (iv) mass number and neutron number

10.  The energy that determines the stability of the nucleus against disintegration is

                (i) cohesion energy        (ii) binding energy (iii) nuclear energy (iv) total energy

11. The force inside the nucleus that keeps the protons and neutrons together is

                (i) atomic force (ii) electrostatic force (iii) nuclear short range force (iv) coulomb force

12. The phenomenon of radioactivity was first discovered by

                (i) Madam curie                (ii) Pierre curie (iii) Henry Becquerel (iv) Roentgen

13. The alpha particle rays are considered to be ________ charged rays

                (i) negatively     (ii) positively     (iii) neutrally     (iv) none

14. ___________ rays are not deflected by electric and magnetic fields.

                (i) alpha rays      (ii) beta rays      (iii) gamma rays               (iv) E-M rays

15.During a radioactive decay process, the parent nucleus transforms into a daughter

     nucleus with mass number and atomic number decreased by 4 units and  2 units respectively, the   

     rays emitted  are

                (i) beta rays and gamma rays      (ii) alpha and gamma rays

                (iii)alpha rays and beta rays        (iv) gamma rays only

16. Time taken by the radioactive substance to decay a half of its substance is defined as

                (i) half life period            (ii) full life period           (iii) time period  (iv) life period

17. Neutrons are particles with ______ charge.

                (i) positive          (ii) negative       (iii) neutral         (iv) zero

18. Neutrons are the constituent particles in all nuclei except _______ .

                (i) Oxygen           (ii) Nitrogen       (iii) Hydrogen  (iv) Boron

19. The method by which the age of any specimen can be estimated is called

                (i) radio-hydrogen dating            (ii) audio-carbon dating

                (iii) radio-carbon dating                               (iv) radio-oxygen dating

20. _______ is used to measure the intensity of radioactive radiation.

                (i) Geiger-Muller counter            (ii) Scintillation counter

                (iii)Cloud chamber                          (iv) counters

21.   The process of breaking up a heavier nucleus into smaller fragments is called

                (i) nuclear fusion             (ii) nuclear fission           (iii) nuclear interaction

                (iv) nuclear disintegration

22. One atomic mass unit ( 1 a.m.u) is approximately equal to

                (i) 931 MeV         (ii) 1001 MeV     (iii) 941 MeV  (iv) 991 MeV

23. __________ is process in which two lighter nuclei combine together to form a heavy nuclei.

             (i) nuclear fission        (ii) nuclear fusion            (iii) nuclear interaction (iv) nuclear decay

24. Hydrogen bomb is based on the principle of

                (i) nuclear fission            (ii) nuclear fusion            (iii) nuclear decay (iv) none

25. The highly ionized state of a gas at high temperature is called

                (i) proton            (ii) plasma          (iii) magma         (iv) lava

26. When photon is converted to form a electron-positron pair, the process is called

                (i) annihilation                 (ii) pair production         (iii) disintegration  (iv) fission 

27. One a.m.u is considered to be equal to

                (i) 1/10th of mass of ¹²C₆               (ii) 1/12th of mass of ¹²C₆             

                (iii)1/12th of mass of ¹⁴C₆              (iv)1/12th of mass of ¹⁴C₇

28. To determine the accurate masses of the atoms, one of the following is used

                (i) G-M counter                                (ii) Bainbridge spectrometer       (iii) Nuclear reactor

                (iv)Mass detector

29. Considering the nuclear force within nucleus between n-n, n-p, p-p to be non-electrostatic, the 

       nature of nuclear force is then

                (i)charge dependent      (ii) charge-mass dependent   (iii) charge mass independent

                (iv)charge independent

30. Madam Curie and her husband Pierre curie discovered the elements

                (i)radium and acitinium (ii)radon and polonium  (iii)radium and polonium

                (iv)radon and actinium

31.When a radioactive element disintegrates and emits radiations, the  daughter nucleus is formed  

      having  atomic number increased by one unit and mass number remains constant. Identify the 

      nature of radioactivity and rays emitted.

                (i) alpha disintegration and alpha rays     (ii) alpha disintegration and gamma rays

                (iii) beta disintegration and beta rays      (ii) beta disintegration and x rays

32.During a radioactive decay of a nucleus, only the energy level of the nucleus changes and atomic 

     and mass numbers remain same. Identify the nature of  radioactive decay.

                (i) alpha decay   (ii) beta decay   (iii) alpha and beta decay              (iv) gamma decay

33.According to the radioactive disintegration law, the rate of disintegration at any instant is directly 

     proportional to __________ .

                (i) No. of protons             (ii) No. of electrons         (iii)No. of atoms               (iv) No. of 

                  neutrons

34.What are thermal neutrons?

                (i) energetic neutrons    (ii) fast neutrons   (iii) slow neutrons       (iv)controlled neutrons

35. The nuclei of ¹³Al²⁷ and ¹⁴Si₂₈ are examples of

                (i) isotopes         (ii)isotones         (iii)isobars           (iv)isomers

36. The mass defect of the certain nuclei is found to be 0.039 a.m.u. Its binding energy is

                (i)27.93 eV          (ii)27.93 MeV     (iii)27.93 KeV      (iv)27.93 meV

37. The nuclear fission can be explained by

                (i)shell model    (ii)liquid drop model       (iii)collective model of nucleus

                (iv) quark model

38.The average energy released per fission is

                (i) 200eV              (ii) 200 MeV        (iii) 200 KeV        (iv) 200 meV

39. The explosion of atom bomb is based on the principle of

                (i) thermo nuclear reaction          (ii)uncontrolled chain reaction

                (iii)controlled fission reaction     (iv)fusion process

40.In alpha decay process,

                (i)mass number decreased by 4 units and atomic number decreased by 2 units

                (ii)mass number increased by 4 units and atomic number increased by 2 units

                (iii)mass number increased by 4 units and atomic number decreased by 2 units

                (iv)mass number increased by 2 unit and atomic number increased by 4 units

41. The ionization power is maximum for

                (i)neutron rays  (ii) alpha rays     (iii)beta rays       (iv) gamma rays

42.__________ is the source of stellar energy.

                (i) Fusion             (ii) Fission            (iii) chain reaction            (iv) thermal reaction

43.The control rods in a nuclear reactor are used to

                (i) bombard neutrons    (ii) absorb neutrons        (iii)scatter neutrons (iv) energize neutrons

44. The purpose of a moderator in a nuclear reactor is to

                (i)absorb neutrons          (ii)bombard neutrons    (iii)slow down neutrons                

                (v)remove neutrons

45. Identify the radio-isotopes used in the medical field

                (i) Co⁶⁰  (ii) C¹²    (iii) P³²   (iv) U²³⁸

46. Which one of the following is not  particle-rays?

                (i) alpha rays      (i)beta rays         (iii) matter waves (iv) gamma rays 

(do give your responses with your name, RRN, and write question No. and responses by clicking at the comments section below)