2nd year physics chapter 19 important questions

Learn 2nd year physics chapter 19 Dawn of Modern Physics Important Questions. These important 2nd year physics mcqs, short and long questions are collected by going through different past papers of all Punjab Board Pakistan.

Why are these questions important?

These Questions are taken from past papers of 2nd year physics . These questions are top repeated of in previous papers of 2nd year physics of all Punjab boards as;

      Bahawalpur Board

      D.G.Khan Board

      Faisalabad Board

      Gujranwala Board

      Lahore Board

      Multan Board

      Rawalpindi Board

Content is created and designed with intense care and diligence. Here is only the most important MCQ, short questions and long questions of 2nd year physics chapter 19 Dawn of Modern Physics.

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You can easily download in pdf format or view 2nd year physics mcqs, short questions and long questions  online. You can easily print these files in simple way. Here you find 2nd year physics chapter 19 Dawn of Modern Physics important mcqs, short and long questions. By Preparing these important questions, you will achieve splendid marks in Physics 12. This content is very helpful for weak students and also helpful for those students that are better at 2nd year physics exam preparation. These Questions are based on the current 2nd year physics syllabus according to Punjab Textbook Board.

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About This Chapter

2nd year physics chapter 19 Dawn of Modern Physics enables the students to learn Relative Motion, Frames of Reference and Special Theory of Relativity. Students learn Black Body Radiation. Students learn Interaction of Electromagnetic Radiation With Matter. Students learn Annihilation of Matter, Wave Nature of Particles and Uncertainty Principle. This Post "2nd year physics chapter 19 important questions" covers all important mcqs, short and long questions related to important  topics of this chapter.

👉Imp MCQs - Physics  12 CH # 19

1. Warner Karl Heisenberg received noble price for physics in :

(A) 1927

(B) 1932

(C) 1945

(D) 1890

(B) 1932

2. Wave nature of light appears in:

(A) Interference

(B) Compton Effect

(C) Both

(D) None

(A) Interference

3. Which phenomenon proves the particle nature of electromagnetic waves:   

(A) Diffraction

(B) Polarization

(C) Photoelectric Effect

(D) None of these

(C) Photoelectric Effect

4. The minimum amount of energy required by photon to create an electron-positron pair:
    

(A) 1.90 MeV

(B) 2.02 MeV

(C) 1.09 MeV

(D) 1.02 MeV

(D) 1.02 MeV

5. The factor 𝒉/(𝒎°𝑪) in the Compton equation has the dimensions of:

(A) Momentum

(B) Pressure

(C) Length

(D) None of these

(C) Length

6. For an electron, the rest mass energy is 

(A) 0.511 MeV

(B) 0.611 MeV

(C) 0.711 MeV

(D) 0.811 MeV

(A) 0.511 MeV

7. In Compton scattering the Compton shift ∆y will be equal to Compton wave length if the scattering angle is:

(A) 0°

(B) 45°

(C) 60°

(D) 90°

(D) 90°

8. Number of electrons emitted in photoelectric effect depends upon: 

(A) Intensity of incident light

(B) Frequency of incident light

(C) Both

(D) None

(A) Intensity of incident light

9. The rest mass of photon is: 

(A) Small

(B) Very small

(C) Zero

(D) Infinite

(C) Zero

10.  The value of plank constant is ?

(A) 6.63 × 10^-34 𝑱.𝒔

(B) 6.63 × 10^-4 𝑱.𝒔

(C) 6.63 × 10^-27 𝑱.𝒔

(D) 6.63 × 10^-24 𝑱.𝒔

(A) 6.63 × 10^-34 𝑱.𝒔

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👉Other Chapters (PDF) of Physics Class 12 Punjab Textbook Board

✅Chapter 12

Electrostatics

✅Chapter 13

Current Electricity

✅Chapter 14

Electromagnetism

✅Chapter 15

Electromagnetic Induction

✅Chapter 16

Alternating Current

✅Chapter 17

Physics of Solids

✅Chapter 18

Electronics

✅Chapter 20

Atomic Spectra

✅Chapter 21

Nuclear Physics