8/18/2019 Sample Physics Questions

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  Nashik

Exam Name:Physics Date:02/02/2016

Time:3Hrs Marks:100Marks

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1. The nuclear model of atom was given by :

a) E Rutherford b) Avogadro

c) Neils bohr d) Dalton

3. Rutherford s atomic model was unstable because:

a) Nucleus is breakdown b) Orbiting electron

radiate energy

c) Electrons do not remain in orbit d) Electrons are

repelled by nucleus

5. According to Rutherford s at mic model the proposed

path of an electron will be :

a) Parabolic b) Spiral

c) Circular d) Straight line

7. Rutherford investigated nuclear structure by

bombarding foil with:

a) X raysb) α particle 

c) β particle  d) γ rays 

9. The nuclear model of atom was proposed by :

a) J. J. Thomson b) Niel Bohr

c) E - Rutherford d) Hertz

11. The size of atom is nearly equal to :

a) 10-14m b) 10-8m

c) 10-10m d) 10-12m

13. Rutherford atomic model proposed that electrons

revolve round the nucleus in circular orbit due to :

a) Nuclear force b) Gravitational force

c) Electrostatic force d) Vander wall s force

15. The empirical atom model was given by

a) J. J. Thomson b) Rutherford

c) Niels bohr d) Sommerfeld

17. Which of the following statement is correct in case

of Thomson s atom model?

a) It explains the phenomenon of thermionic emission,

photoelectric emission and ionisation b) It could not

explain emission of line spectra by elements

c) It could not explain scattering of α-particles d) All

of these

19. The electrons of Rutherford s model would be

expected to lose energy because, they

a) Move randomly b) Jump on nucleus

c) Radiate electromagnetic waves d) Escape from

the atom

21. Bohr s atom model is the modification of

Rutherford s atom model by the application of

2. Rutherford s atomic model was failed because, he

assumed that:

a) Electrons revolve along only permitted circular

orbits b) Electrons are

positively charged and protons are –ve ly charged

c) Electrons are negatively charged and protons are

positively charged d) Electrons

revolve along a circular orbits of any radii and radiate

energy

4. Rutherford s experiment of bombarding the gold foil

with –particle was used to establish the electron theory

by :

a) Determining mass in the nucleus b) Determining

number of protons in the nucleus

c) Proving that the atom is mostly empty space with

positive charge concentrated at the

centre d) Determining

number of neutrons in the nucleus

6. According to classical theory, the proposed path of

electron in Rutherford s atomic model will be:

a) Parabolic b) Spiral

c) Circular d) Straight line

8. Atom consists negatively charged electron embeded in

a positively charged sphere was given by:

a) J. J. Thomson b) Rutherford

c) Sommerfeld d) Bohr

10. According to Rutheford the radius of postively charged

nucleus is about:

a) 10–14 m b) 10–12m

c) 10–14 cm d) 10–12 cm

12. Rutherford s experiment on scattering of α –  particle by

thin foil establishes the existance of:

a) Negatively charged nucleus b) Positively

charged nucleus

c) Neutrons in the nucleus d) Nucleus

partially positive and partially negative

14. Which of the following is the drawback of Rutherford

atomic model:

a) Revolving electron radiate energy continuously, move

in spiral path and fall in the nucleus b) Outcoming

light radiation consist of spectral lines of decreasing

frequency

c) Outcoming light radiation consists of spectral lines of

fixed frequency d) Revolving

electron absorb energy, and bound with nucleus.

16. Electrons in the atom are held due to

a) Coulomb s forces b) Nuclear

forces

c) Gravitational forces d) Vander Wall s

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8/18/2019 Sample Physics Questions

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a) Newtons theory b) Huygen s theory

c) Maxwell s theory d) Planck s quantum

theory

23. According to Bohr s model, angular momentum of

electron is equal to integral multiple of

a) h b) π/h 

c) 2h/π  d) h/2π 

25. When an electron jumps from the initial orbit ni to

the final orbit nf, the energy radiated is given by

a) hv=Ei/Ef b) hv=EiEf

c) hv=Ei+Ef d) hv = Ei - Ef

forces

18. According, to Rutherford, electrons revolve in a

circular orbit around the nucleus in order to

a) Attract protons b) Absorb

energy

c) Radiate energy d) Nullify

attraction from nucleus

20. Alpha–particles that come closer to nuclei

a) Are deflected more b) Are deflected

less

c) Make more collisions d) Are solved

down more

22. According to Bohr s atom model, an electron can

revolve around a nucleus, if its orbit is a circle of

a) Unchanged radius b) Permitted

radius

c) Increasing radius d) Decreasing

radius

24. According to Bohr the difference between the energies

of the electron in the two orbits is equa to

a) hv b) hc/ λ 

c) Both A and B d) Neither A nor

B

THIS IS THE SIMPLE WORD DEMO : THANKS YOU.

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