Solved NCERT Questions For Class 12 Physics Chapter 11 In Hindi - Free PDF
FAQs on NCERT Solutions For Class 12 Physics Chapter 11 Dual Nature of Radiation and Matter in Hindi - 2025-26
1. What is the correct stepwise method to solve numerical questions in NCERT Solutions for Class 12 Physics Chapter 11?
To solve numerical questions in Chapter 11 Dual Nature Of Radiation And Matter following the NCERT Solutions method, students should:
- Identify the physical principle or concept involved (e.g., photoelectric effect, de Broglie wavelength).
- Write down the given data and required unknowns clearly.
- Select the relevant formula (as per NCERT).
- Substitute the values and solve step-by-step, maintaining units throughout.
- Box the final answer for clarity.
This approach ensures answers are CBSE-compliant and easy to review.
2. How do NCERT Solutions for Dual Nature Of Radiation And Matter help clarify the concept of matter waves for board exams?
NCERT Solutions explain matter waves using clear derivations, such as the de Broglie wavelength formula λ = h/p. Stepwise solutions connect the underlying theory to problem-solving, ensuring students can both define and apply the concept accurately in the exam, as required by the CBSE syllabus.
3. What are common mistakes students make when answering stepwise problems in Chapter 11 NCERT Solutions?
Common mistakes include:
- Skipping steps in derivations, leading to incomplete answers.
- Confusing units, especially between energy (joules, eV) and wavelength (meters, nanometers).
- Applying incorrect formulae (e.g., using classical mechanics where quantum mechanics is required).
Following the structured NCERT Solutions method prevents these errors.
4. Why is it important to follow the NCERT Solutions' prescribed format while solving Dual Nature Of Radiation And Matter questions?
Using the prescribed format ensures:
- Each logical step is clearly shown, improving CBSE exam scores.
- The answer matches official marking schemes.
- Key reasoning is highlighted, making answers easier for examiners to evaluate.
5. How do NCERT Solutions ensure correct application of the photoelectric equation in board-level problems?
NCERT Solutions demonstrate the photoelectric equation stepwise, starting from E = hν - ϕ, explaining each term and condition for electron emission. This builds both conceptual clarity and numerical accuracy, which are expected for Class 12 CBSE exams.
6. What stepwise process is recommended for deriving the de Broglie wavelength in NCERT Solutions for Class 12 Physics Chapter 11?
The recommended process is:
- State the de Broglie hypothesis.
- Write the momentum relationship: p = mv.
- Express wavelength: λ = h/p.
- Substitute for kinetic energy where appropriate, using formulas like λ = h/√2mE.
- Present the final answer with units.
7. In what ways do NCERT Solutions for Chapter 11 cover both conceptual and numerical questions to aid student understanding?
NCERT Solutions address:
- Conceptual questions by providing detailed explanations and derivations (e.g., explaining the photon model, wave-particle duality).
- Numerical questions by presenting stepwise solutions, formula application, and unit conversions, enhancing comprehensive exam preparation.
8. How can students use stepwise NCERT Solutions to avoid misconceptions related to the wave-particle duality in board exams?
By following NCERT Solutions that systematically distinguish between wave-like and particle-like properties for both matter and radiation, students build correct conceptual frameworks. For example, explicit steps clarify when to apply the photon theory vs. classical wave theory, reducing misapplication of concepts in the CBSE pattern questions.
9. Why are diagrams and correct labeling important in NCERT Solutions for Dual Nature Of Radiation And Matter?
Well-labeled diagrams (such as the photoelectric effect setup or Davisson-Germer experiment) are critical, as they:
- Aid visual understanding of experimental arrangements.
- Support stepwise explanations in answers.
- Score marks per CBSE marking scheme, where labels and clear representation are explicitly rewarded.
