L-7 » Dual nature of Matter and Radiation- MCQs (12th) | Physics | Objective Questions- 12th

Multiple Choice

ID- 16054

BSEB, 2019 (C)

1. Which one of the following is deflected in electric field?

(A) Gamma rays
(B) X-rays
(C) Ultraviolet rays
(D) Cathode rays

Oct 25, 2022 at 07:57 AM

Multiple Choice

ID- 16055

BSEB, 2020 (A)

2. Wavelength of a particles of mass $m$ moving with velocity $V$ is:

(A) $λ = \frac{mV}{h}$
(B) $λ = \frac{h}{mV}$
(C) $λ = h. mV$
(D) $λ = \frac{mV}{h^2}$

Oct 25, 2022 at 08:00 AM

Multiple Choice

ID- 16056

3. The specific charge of peoron is $9.6$ x $10^7$ C $\ce{kg^{–1}}$. The specific charge of an alpha particle will be

(A) $\ce{9.6 x 10^7 C kg^{–1}}$
(B) $\ce{19.2 x 10^7 C kg^{–1}}$
(C) $\ce{4.8 x 10^7 C kg^{–1}}$
(D) $\ce{2.4x 10^7 C kg^{–1}}$

Oct 25, 2022 at 04:26 PM

Multiple Choice

ID- 16057

4. Who established that electric charge is quantised?

(A) J.J Thomson
(B) William Crookes
(C) R.A. Millikan
(D) Wihelm Rontgen

Oct 25, 2022 at 04:29 PM

Multiple Choice

ID- 16058

5. Cathode rays were discovered by:

(A) Maxwell Clerk James
(B) Heinrich Hertz
(C) William Crookes
(D) J. J. Thomson

Oct 25, 2022 at 04:30 PM

Multiple Choice

ID- 16059

BSEB, 2018 (C)

6. Definite value of energy possessed by a quantum of radiation is called:

(A) Proton
(B) Photon
(C) Deuteron
(D) Lepton

Oct 25, 2022 at 04:33 PM

Multiple Choice

ID- 16060

7. The phenomenon of photoelectric emission was discovered in 1887 by:

(A) Albert Einstein
(B) Heinrich Hertz
(C) Wilhelm Hallwachs
(D) Philipp Lenard

Oct 25, 2022 at 04:35 PM

Multiple Choice

ID- 16061

8. Which one among the following shows particle nature of light?

(A) Photoelectric effect
(B) Interference
(C) Refraction
(D) Polarization

Oct 25, 2022 at 04:37 PM

Multiple Choice

ID- 16062

9. The maximum value of photoelectric current is called:

(A) base current
(B) saturation current
(C) collector current
(D) emitter current

Oct 25, 2022 at 04:41 PM

Multiple Choice

ID- 16063

10. The time taken by a photoelectron to come out after the photon strikes is approximately:

(A) $10^{–1}$ s
(B) $10^{–4}$ s
(C) $10^{–10}$ s
(D) $10^{–16}$ s

Oct 25, 2022 at 04:43 PM

Multiple Choice

ID- 16064

11. Light of wavelength λ falls on a metal having work function $\frac{hc}{λ_0}$. Photoelectric effect will taken place on:

(A) λ ≥ λ_0
(B) λ ≤ λ_0
(C) λ ≥ 2λ_0
(D) λ = 4λ_0

Oct 25, 2022 at 04:56 PM

Multiple Choice

ID- 16065

12. Who won the Nobel prize I physics in the year 1929 for the discovery of the wave nature of electrons?

(A) Erwin Schrodinger
(B) R. A. Millikan
(C) Louis Victor de Broglie
(D) Albert Einstein

Oct 25, 2022 at 04:59 PM

Multiple Choice

ID- 16066

13. The rest mass of photon is:

(A) $\frac{hv}{c}$
(B) $\frac{hv}{c^2}$
(C) $\frac{hv}{λ}$
(D) zero

Oct 25, 2022 at 05:00 PM

Multiple Choice

ID- 16067

14. The linear momentum of a 3 MeV photon is:

(A) $\ce{0.01 eV s m^{–1}}$
(B) $\ce{0.02 eV s m^{–1}}$
(C) $\ce{0.03 eV s m^{–1}}$
(D) $\ce{0.04 eV s m^{–1}}$

Oct 25, 2022 at 05:02 PM

Multiple Choice

ID- 16068

15. The de Broglie wavelength of a particle of kinetic energy $K$ is λ. What will be the wavelength of the particle, if its kinetic energy is $\frac{K}{4}$?

(A) λ
(B) 2λ
(C) $\frac{λ}{2}$
(D) 4λ

Oct 25, 2022 at 05:05 PM

Multiple Choice

ID- 16069

16. When the velocity of an electron increases, its de Broglie wavelength:

(A) increases
(B) decreases
(C) remain same
(D) may increase or decrease

Oct 25, 2022 at 05:06 PM

Multiple Choice

ID- 16070

17. Which of the following devices is sometimes called an electric eye?

(A) LED
(B) Photocell
(C) Integrated chip (IC)
(D) Solar cell

Oct 25, 2022 at 05:13 PM

Multiple Choice

ID- 16071

BSEB, 2021 (A)

18. Rest mass of photon is:

(A) zero
(B) Infinite
(C) $\ce{9.1 x 10^{–31} kg}$
(D) $\ce{1.6 x 10^{–27} kg}$

Oct 25, 2022 at 05:16 PM

Multiple Choice

ID- 16072

19. If $h$ is Planck's constant, the momentum of a photon of wavelength 0.01 Å is:

(A) $10^{–2}h$
(B) h
(C) $10^2h$
(D) $10^{12}h$

Oct 25, 2022 at 05:19 PM

Multiple Choice

ID- 16073

20. The de Broglie wavelength is given by:

(A) $p = \frac{2πh}{λ}$
(B) $p = \frac{2λ}{h}$
(C) $p = \frac{2π}{hλ}$
(D) $p = \frac{2π}{λ}$

Oct 25, 2022 at 05:22 PM

Multiple Choice

ID- 16074

21. Which of these particles having the same kinetic energy has the largest de Broglie wavelength?

(A) Electron
(B) Alpha particle
(C) Proton
(D) Neutron

Oct 25, 2022 at 05:24 PM

Multiple Choice

ID- 16075

22. In which of the following photocell is not used?

(A) Burglar alarm
(B) Television camera
(C) Automatic street lights
(D) Vaccum cleaner

Oct 25, 2022 at 05:26 PM

Multiple Choice

ID- 16076

23. In Davisson and Germer experiment, the tungsten filament is coated with:

(A) aluminum oxide
(B) barium chloride
(C) titanium oxide
(D) barium oxide

Oct 25, 2022 at 05:28 PM

Multiple Choice

ID- 16077

24. G.P. Thomas experimentally confirmed the existence of matter waves by the phenomena:

(A) diffraction
(B) retraction
(C) polarization
(D) scattering

Oct 26, 2022 at 07:19 AM

Multiple Choice

ID- 16078

25. De-Broglie equation states the:

(A) dual nature
(B) particle nature
(C) wave nature
(D) none of these

Oct 26, 2022 at 07:20 AM

Multiple Choice

ID- 16079

26. Protons and alpha particles have the same de-Broglie wavelength. What is same for both of them?

(A) Energy
(B) Time period
(C) Frequency
(D) Momentum

Oct 26, 2022 at 07:22 AM

Multiple Choice

ID- 16080

27. Kinetic energy of emitted electrons depends upon:

(A) frequency
(B) intensity
(C) nature of atmosphere surrounding the electrons
(D) none of these

Oct 26, 2022 at 07:23 AM

Multiple Choice

ID- 16081

28. The ratio of specific charge of an alpha particle to the proton is:

(A) 1 : 2
(B) 2 : 1
(C) 4 : 1
(D) 1 : 4

Oct 26, 2022 at 07:25 AM

Multiple Choice

ID- 16082

29. In Thompson's experiment number of parabola gives:

(A) the no. of electrons present in element
(B) the no. of electrons present in element
(C) the no. of neutrons present in element
(D) the no. of isotopes of the element present

Oct 26, 2022 at 07:29 AM

Multiple Choice

ID- 16083

30. The strength of photoelectric current depends upon:

(A) angle of incident radiation
(B) frequency of incident radiation
(C) intensity of incident radiation
(D) distance between anode and cathode

Oct 26, 2022 at 07:31 AM

Multiple Choice

ID- 16084

31. The momentum of an electron that emits a wavelength of 2Å will be:

(A) $\ce{6.4 x 10^{–36} kg ms^{–1}}$
(B) $\ce{3.3 x 10^{–24} kg ms^{–1}}$
(C) $\ce{3.3x 10^{–34} kg ms^{–1}}$
(D) none of these

Oct 26, 2022 at 07:34 AM

Multiple Choice

ID- 16085

32. Name the scientists who first studied the passage of electricity through fluids to establish the electrical nature of matter:

(A) Millikan
(B) Planck
(C) Farday
(D) Boyle

Oct 26, 2022 at 07:35 AM

Multiple Choice

ID- 16086

33. Millikan's oil drop experiment makes use of:

(A) Stokes' law
(B) Boyle's law
(C) Gas equation
(D) Bernoulli' theorem

Oct 26, 2022 at 07:37 AM

Multiple Choice

ID- 16087

34. X-rays are:

(A) deflected by an electric field
(B) deflected by a magnetic field
(C) deflected by both electric and magnetic fields
(D) not deflected by electric and magnetic fields

Oct 26, 2022 at 07:38 AM

Multiple Choice

ID- 16088

35. Which of the following radiation cannot eject photo electrons?

(A) ultraviolet
(B) infrared
(C) visible
(D) X-rays

Oct 26, 2022 at 08:31 AM

Multiple Choice

ID- 16089

36. When a yellow light is incident on a surface, no electrons are emitted while green light can emit electrons. If the red light in incident on the surface then:

(A) no electrons are emitted
(B) photons are emitted
(C) electrons of higher energy are emitted
(D) electrons of lower energy are emitted

Oct 26, 2022 at 08:33 AM

Multiple Choice

ID- 16090

37. Evidence of the wave nature of light cannot be obtained from:

(A) diffraction
(B) interference
(C) doppler effect
(D) reflection

Oct 26, 2022 at 08:35 AM

Multiple Choice

ID- 16091

38. With which characteristics of a target does the Mosley's law relate the frequency of X-rays?

(A) density
(B) atomic number
(C) atomic weight
(D) interatomic space

Oct 26, 2022 at 08:36 AM

Multiple Choice

ID- 16092

39. The charge of a photo electron is:

(A) $\ce{9.1 x 10^{–31} C}$
(B) $\ce{9.1 x 10^{–27} C}$
(C) $\ce{9.1 x 10^{–24} C}$
(D) none of these

Oct 26, 2022 at 08:38 AM

Multiple Choice

ID- 16093

40. Compared to liquids and solids, gases are:

(A) good conductors of electricity
(B) best conductors of electricity
(C) very poor conductors of electricity
(D) good or bad conductors of electricity depending upon the nature of the gas:

Oct 26, 2022 at 08:39 AM

Multiple Choice

ID- 16094

41. Thermions are:

(A) electrons
(B) protons
(C) photons
(D) positrons

Oct 26, 2022 at 08:43 AM

Multiple Choice

ID- 16095

42. A photocell converts light energy into:

(A) electric energy
(B) magnetic energy
(C) sound energy
(D) None of these

Oct 26, 2022 at 08:44 AM

Multiple Choice

ID- 16096

43. In which of the phenomenon does light interact with matter?

(A) diffraction
(B) polarisation
(C) dispersion
(D) photoelectric effect

Oct 26, 2022 at 08:51 AM

Multiple Choice

ID- 16097

44. Photoelectric effect was discovered by:

(A) Hertz
(B) Hallwaqchs
(C) Lenard
(D) MKillikam

Oct 26, 2022 at 08:52 AM

Multiple Choice

ID- 16098

45. A metal surface ejects electrons when hit by green light but none when hit by yellow light. The electrons will be ejected when the surface is hot by:

(A) blue light
(B) heat rays
(C) infrared light
(D) red light

Oct 26, 2022 at 08:54 AM

Multiple Choice

ID- 16099

46. Photoelectric effect can be caused by:

(A) X-rays
(B) Visible light
(C) $γ$-rays
(D) All of these

Oct 26, 2022 at 09:07 AM

Multiple Choice

ID- 16100

BSEB, 2016

47. β-rays are deflected in:

(A) gravitational field
(B) only in magnetic field
(C) only in electric field
(D) both in magnetic and electric fields

Oct 26, 2022 at 09:03 AM

Multiple Choice

ID- 16101

BSEB, 2016 (A)

48. Energy of a photon of wavelength λ is:

(A) hcλ
(B) hc / λ
(C) hλ / c
(D) λ / hc

Oct 26, 2022 at 09:06 AM

Multiple Choice

ID- 16102

BSEB, 2016 (C)

49. When light enters into glass its wavelength:

(A) Decreases
(B) Increases
(C) Remains the same
(D) None of these

Oct 26, 2022 at 09:08 AM

Multiple Choice

ID- 16103

BSEB, 2020 (A)

50. Dimention of plank constant is:

(A) $\ce{ML^2T^{–1}}$
(B) $\ce{ML^2T^{–2}}$
(C) $\ce{MLT^{–1}}$
(D) $\ce{MLT^2}$

Oct 26, 2022 at 09:11 AM

Multiple Choice

ID- 16104

BSEB, 2017 (A)

51. The energy of emitted photo electron depends upon:

(A) Intensity of light
(B) Wave length of light
(C) Work-function of metal
(D) None of these

Oct 26, 2022 at 09:12 AM

Multiple Choice

ID- 16105

BSEB, 2017 (A)

52. The critical angle of light passing from glass to air is minimum for:

(A) Red colour
(B) Green colour
(C) Yellow colour
(D) Violet colour

Oct 26, 2022 at 09:13 AM

Multiple Choice

ID- 16106

BSEB, 2017 (A)

53. Transverse nature of light is shown by:

(A) Interference
(B) Reflection
(C) Polarisation
(D) Dispersion

Oct 26, 2022 at 09:14 AM

Multiple Choice

ID- 16107

BSEB, 2018 (A)

54. A particel of mass $m$ and charged $q$ is accelerated through a potential $V$. The De-Broglie wavelength of the particle will be:

(A) $\frac{Vh}{\sqrt{2qm}}$
(B) $\frac{q}{\sqrt{2mV}}$
(C) $\frac{h}{\sqrt{2qmV}}$
(D) $\frac{mh}{\sqrt{2qV}}$

Oct 26, 2022 at 09:18 AM

Multiple Choice

ID- 16108

BSEB, 2018 (A)

55. The minimum angular momentum of electron in Hydrogen atom will be:

(A) $\frac{h}{π}Js$
(B) $\frac{h}{2π}Js$
(C) $hπ . Js$
(D) $2π h Js$

Oct 26, 2022 at 09:20 AM

Multiple Choice

ID- 16109

BSEB, 2017 (C)

56. Kirchhoffe's second low of conservation of:

(A) charge
(B) energy
(C) momentum
(D) angular momentum

Oct 26, 2022 at 09:22 AM

Multiple Choice

ID- 16110

BSEB, 2017 (C)

57. Life of a fossil in estimated by:

(A) carbon dating
(B) X-ray
(C) $γ$-ray
(D) laser

Oct 26, 2022 at 09:23 AM

Dual nature of Matter and Radiation

Board » Bihar Board » Class 12th » English Medium » Science » Physics » L-7: Dual nature of Matter and Radiation

Objective Questions (MCQs)

1. Which one of the following is deflected in electric field?

2. Wavelength of a particles of mass $m$ moving with velocity $V$ is:

3. The specific charge of peoron is $9.6$ x $10^7$ C $\ce{kg^{–1}}$. The specific charge of an alpha particle will be

4. Who established that electric charge is quantised?

5. Cathode rays were discovered by:

6. Definite value of energy possessed by a quantum of radiation is called:

7. The phenomenon of photoelectric emission was discovered in 1887 by:

8. Which one among the following shows particle nature of light?

9. The maximum value of photoelectric current is called:

10. The time taken by a photoelectron to come out after the photon strikes is approximately:

11. Light of wavelength λ falls on a metal having work function $\frac{hc}{λ_0}$. Photoelectric effect will taken place on:

12. Who won the Nobel prize I physics in the year 1929 for the discovery of the wave nature of electrons?

13. The rest mass of photon is:

14. The linear momentum of a 3 MeV photon is:

15. The de Broglie wavelength of a particle of kinetic energy $K$ is λ. What will be the wavelength of the particle, if its kinetic energy is $\frac{K}{4}$?

16. When the velocity of an electron increases, its de Broglie wavelength:

17. Which of the following devices is sometimes called an electric eye?

18. Rest mass of photon is:

19. If $h$ is Planck's constant, the momentum of a photon of wavelength 0.01 Å is:

20. The de Broglie wavelength is given by:

21. Which of these particles having the same kinetic energy has the largest de Broglie wavelength?

22. In which of the following photocell is not used?

23. In Davisson and Germer experiment, the tungsten filament is coated with:

24. G.P. Thomas experimentally confirmed the existence of matter waves by the phenomena:

25. De-Broglie equation states the:

26. Protons and alpha particles have the same de-Broglie wavelength. What is same for both of them?

27. Kinetic energy of emitted electrons depends upon:

28. The ratio of specific charge of an alpha particle to the proton is:

29. In Thompson's experiment number of parabola gives:

30. The strength of photoelectric current depends upon:

31. The momentum of an electron that emits a wavelength of 2Å will be:

32. Name the scientists who first studied the passage of electricity through fluids to establish the electrical nature of matter:

33. Millikan's oil drop experiment makes use of:

34. X-rays are:

35. Which of the following radiation cannot eject photo electrons?

36. When a yellow light is incident on a surface, no electrons are emitted while green light can emit electrons. If the red light in incident on the surface then:

37. Evidence of the wave nature of light cannot be obtained from:

38. With which characteristics of a target does the Mosley's law relate the frequency of X-rays?

39. The charge of a photo electron is:

40. Compared to liquids and solids, gases are:

41. Thermions are:

42. A photocell converts light energy into:

43. In which of the phenomenon does light interact with matter?

44. Photoelectric effect was discovered by:

45. A metal surface ejects electrons when hit by green light but none when hit by yellow light. The electrons will be ejected when the surface is hot by:

46. Photoelectric effect can be caused by:

47. β-rays are deflected in:

48. Energy of a photon of wavelength λ is:

49. When light enters into glass its wavelength:

50. Dimention of plank constant is:

51. The energy of emitted photo electron depends upon:

52. The critical angle of light passing from glass to air is minimum for:

53. Transverse nature of light is shown by:

54. A particel of mass $m$ and charged $q$ is accelerated through a potential $V$. The De-Broglie wavelength of the particle will be:

55. The minimum angular momentum of electron in Hydrogen atom will be:

56. Kirchhoffe's second low of conservation of:

57. Life of a fossil in estimated by: