Read and download free pdf of CBSE Class 12 Physics Dual Nature of Radiation and Matter Worksheet. Download printable Physics Class 12 Worksheets in pdf format, CBSE Class 12 Physics Chapter 11 Dual Nature of Radiation and Matter Worksheet has been prepared as per the latest syllabus and exam pattern issued by CBSE, NCERT and KVS. Also download free pdf Physics Class 12 Assignments and practice them daily to get better marks in tests and exams for Class 12. Free chapter wise worksheets with answers have been designed by Class 12 teachers as per latest examination pattern
Chapter 11 Dual Nature of Radiation and Matter Physics Worksheet for Class 12
Class 12 Physics students should refer to the following printable worksheet in Pdf in Class 12. This test paper with questions and solutions for Class 12 Physics will be very useful for tests and exams and help you to score better marks
Class 12 Physics Chapter 11 Dual Nature of Radiation and Matter Worksheet Pdf
Question. Which of the following metals is not sensitive to visible light?
a. Cesium
b. Sodium
c. Rubidium
d. Cadmium
Answer. D
Question. Photons are deflected by
a. electric field only
b. magnetic field only
c. electromagnetic field
d. None of these
Answer. D
Question. The momentum of a photon of wavelength λ is
a. hλ
b. h/λ
c. λ/h
d. h/c λ
Answer. B
Question. Maximum KE of photo electrons is 4 e V Then the stopping potential is
a. 4 V
b. 1.6 V
c. 4 J
d. 4 e V
Answer. A
ASSERTION- REASON
Directions: In each of the following questions, a statement of Assertion (A) is given followed by a corresponding statement of Reason (R) just below it. Of the statements, mark the correct answer as:
(A)If both assertion and reason are true and reason is the correct explanation of assertion
(B)If both assertion and reason are true but reason is not the correct explanation of assertion
(C)If assertion is true and reason is false
(D)If both assertion and reason are false
Question. Assertion: A photon has no rest mass , yet it carries definite momentum.
Reason: Momentum of photon is due to its energy and hence its equivalent mass.
(a) A
(b) B
(c) C
(d) D
Answer. A
Question. Assertion: Photoelectric effect demonstrates the wave nature of light.
Reason. The number of photoelectrons is proportional to the frequency of light.
(a) A
(b) B
(c) C
(d) D
Answer. D
Question. Assertion: When light of certain wavelength falls on a metal surface it ejects electron.
Reason: Light has wave nature.
(a) A
(b) B
(c) C
(d) D
Answer. B
Question. Assertion: As work function of a material increases by some mechanism, it requires greater energy to excite the electrons from its surface.
Reason. A plot of stopping potential (V) versus frequency (v) for different materials, has greater slope for metals with greater work functions
(a) A
(b) B
(c) C
(d) D
Answer. C
Question. Assertion: Light of frequency 1.5 times the threshold frequency is incident on photosensitive material. If the frequency is halved and intensity is doubled the photo current remains unchanged.
Reason:The photo electric current varies directly with the intensity of light and frequency of light.
(a) A
(b) B
(c) C
(d) D
Answer. D
Question. Assertion: The de-Broglie wavelength of a neutron when its kinetic energy is k is λ. Its wavelength is 2 λ when its kinetic energy is 4k.
Reason. The de - Broglie wavelength λ is proportional to square root of the kinetic energy.
(a) A
(b) B
(c) C
(d) D
Answer. A
1 Marks Questions
Question. A proton and an electron have same kinetic energy. Which one has greater de-Broglie wavelength and why?
Answer. λ = h /𝑝 = ℎ/ √2𝑚𝐾, λe > λp
Question. The de-Broglie wavelength associated with an electron accelerated through a potential difference V is λ. What will be its wavelength when the accelerating potential is increased to 4V?
Answer. 𝜆 = 12.27/ √𝑉 𝐴̇0
for V = 4 V, 𝜆 = 12.27/ √4 𝐴̇ = 6.135𝐴̇0
Question. The maximum kinetic energy of a photoelectron is 3 eV. What is its stopping potential ?
Answer. KEmax = 3 eV => 3eV = eV0 => V0 = 3V
Question. It is difficult to eject out an electron from copper than sodium, which of the two metals has greater work function and which has greater threshold wavelength?
Answer. Since electron ejection is difficult from copper than sodium, so copper has greater work function than sodium. As threshold wavelength is inversely related with work function, so sodium has higher threshold wavelength than copper.
2 Marks Questions
Question. An alpha particle and a proton are accelerated through same potential difference. Find the ratio (vᾳ/vp) of velocities acquired by two particles.
Answer. Gain in K.E = qV
½ mpvp2 =qp V, ½ mαvα2 =qα V
½ mαvα2 / ½ mpvp2 = qα /qα
Vα2 / Vp2 = qα /qα x mp /mα = 2/1 x 1/4 =1/2
Vα / Vp = 1/√2
Question. (i). The stopping potential in an experiment on photoelectric effect is 1.5 V. What is the maximum kinetic energy of the photoelectrons emitted?
(ii) State one factor which determines the intensity of light in the photon picture of light.
Answer. (i) 1.5eV
(ii) Number of photons emitted per second
Question. Monochromatic light of frequency 6x1014 Hz is produced by a laser. The power emitted is 2x103 W i) What is the energy of photon in the light? ii) How many photons per second on the average are emitted by the source
Answer. ν = 6 x 1014 Hz, P = 2 x 10-3 W
i) energy of photon = E = hν = 6.6x10-34 x 6 x1014 = 3.98 x10-19 J
ii) If N is the number of photons emitted per second by the source then Power = N x energy of photon
P = NE N = P/E = 2x10-3/3.98 x 10-19 = 5 x 1015 photons per second
Question. The work function of a certain metal is 4.2 eV. Will this metal give photoelectric emission for incident radiation of wavelength 330 nm?
Answer. E = hc/λ = 6.6×10−34×3×108 / 330 x10-9 = 3.767eV ϕo = 4.2eV
Since E < W0 no photoelectric emission.
Please click on below link to download CBSE Class 12 Physics Rapid Revision Question Bank Set A
CBSE Class 12 Physics Alternating Current Worksheet Set A |
CBSE Class 12 Physics Alternating Current Worksheet Set B |
CBSE Class 12 Physics Electromagnetic Waves Worksheet |
CBSE Class 12 Physics Wave Optics Worksheet |
CBSE Class 12 Physics Wave Optics Worksheet Set A |
CBSE Class 12 Physics Atoms And Nuclei Worksheet |
CBSE Class 12 Physics Atoms Worksheet Set A |
CBSE Class 12 Physics Nuclei Worksheet |
CBSE Class 12 Physics Semiconductor Devices And Communication System Worksheet |
CBSE Class 12 Physics Semiconductor Materials Device And Simple Worksheet |
More Study Material
CBSE Class 12 Physics Chapter 11 Dual Nature of Radiation and Matter Worksheet
The above practice worksheet for Chapter 11 Dual Nature of Radiation and Matter has been designed as per the current syllabus for Class 12 Physics released by CBSE. Students studying in Class 12 can easily download in Pdf format and practice the questions and answers given in the above practice worksheet for Class 12 Physics on a daily basis. All the latest practice worksheets with solutions have been developed for Physics by referring to the most important and regularly asked topics that the students should learn and practice to get better scores in their examinations. Studiestoday is the best portal for Printable Worksheets for Class 12 Physics students to get all the latest study material free of cost.
Worksheet for Physics CBSE Class 12 Chapter 11 Dual Nature of Radiation and Matter
Teachers of studiestoday have referred to the NCERT book for Class 12 Physics to develop the Physics Class 12 worksheet. If you download the practice worksheet for the above chapter daily, you will get better scores in Class 12 exams this year as you will have stronger concepts. Daily questions practice of Physics printable worksheet and its study material will help students to have a stronger understanding of all concepts and also make them experts on all scoring topics. You can easily download and save all revision Worksheets for Class 12 Physics also from www.studiestoday.com without paying anything in Pdf format. After solving the questions given in the practice sheet which have been developed as per the latest course books also refer to the NCERT solutions for Class 12 Physics designed by our teachers
Chapter 11 Dual Nature of Radiation and Matter worksheet Physics CBSE Class 12
All practice paper sheet given above for Class 12 Physics have been made as per the latest syllabus and books issued for the current academic year. The students of Class 12 can be assured that the answers have been also provided by our teachers for all test paper of Physics so that you are able to solve the problems and then compare your answers with the solutions provided by us. We have also provided a lot of MCQ questions for Class 12 Physics in the worksheet so that you can solve questions relating to all topics given in each chapter. All study material for Class 12 Physics students have been given on studiestoday.
Chapter 11 Dual Nature of Radiation and Matter CBSE Class 12 Physics Worksheet
Regular printable worksheet practice helps to gain more practice in solving questions to obtain a more comprehensive understanding of Chapter 11 Dual Nature of Radiation and Matter concepts. Practice worksheets play an important role in developing an understanding of Chapter 11 Dual Nature of Radiation and Matter in CBSE Class 12. Students can download and save or print all the printable worksheets, assignments, and practice sheets of the above chapter in Class 12 Physics in Pdf format from studiestoday. You can print or read them online on your computer or mobile or any other device. After solving these you should also refer to Class 12 Physics MCQ Test for the same chapter.
Worksheet for CBSE Physics Class 12 Chapter 11 Dual Nature of Radiation and Matter
CBSE Class 12 Physics best textbooks have been used for writing the problems given in the above worksheet. If you have tests coming up then you should revise all concepts relating to Chapter 11 Dual Nature of Radiation and Matter and then take out a print of the above practice sheet and attempt all problems. We have also provided a lot of other Worksheets for Class 12 Physics which you can use to further make yourself better in Physics
You can download the CBSE Practice worksheets for Class 12 Physics Chapter 11 Dual Nature of Radiation and Matter for the latest session from StudiesToday.com
Yes, you can click on the links above and download chapter-wise Practice worksheets in PDFs for Class 12 for Physics Chapter 11 Dual Nature of Radiation and Matter
Yes, the Practice worksheets issued for Chapter 11 Dual Nature of Radiation and Matter Class 12 Physics have been made available here for the latest academic session
You can easily access the links above and download the Class 12 Practice worksheets Physics for Chapter 11 Dual Nature of Radiation and Matter
There is no charge for the Practice worksheets for Class 12 CBSE Physics Chapter 11 Dual Nature of Radiation and Matter you can download everything free
Regular revision of practice worksheets given on studiestoday for Class 12 subject Physics Chapter 11 Dual Nature of Radiation and Matter can help you to score better marks in exams
Yes, studiestoday.com provides all the latest Class 12 Physics Chapter 11 Dual Nature of Radiation and Matter test practice sheets with answers based on the latest books for the current academic session
Yes, studiestoday provides worksheets in Pdf for Chapter 11 Dual Nature of Radiation and Matter Class 12 Physics in mobile-friendly format and can be accessed on smartphones and tablets.
Yes, practice worksheets for Class 12 Physics Chapter 11 Dual Nature of Radiation and Matter are available in multiple languages, including English, Hindi