JAC 12th Physics Ch 11 Important Questions 2025 Dual Nature of Matter and Radiation

JAC 12th Physics Ch 11 Important Questions 2025 : झारखण्ड बोर्ड कक्षा 12th सभी विद्यार्थियों के लिए Physics Unit 7. में Chapter 11 Dual Nature of Matter and Radiations के पिछले वर्षो में जो भी प्रश्न पूछे गए हैं, उनकी चर्चा हम इसमें करेंगे तो इन Important Questions को पढ़ लीजिए.

रांची: झारखंड एकेडमिक काउंसिल ( JAC Board) कक्षा JAC 12th Physics Important Questions के पिछले वर्षों के सभी महत्वपूर्ण प्रश्न (important Questions) आपको यहाँ पर बताए जा रहे है, जो बोर्ड परीक्षा 2025 के लिए बहुत महत्वपूर्ण है. अगर आप इन सभी प्रश्नों को याद कर लेते हो तो अवश्य ही आप JAC Board class 12th Physics exam 2025 में अच्छे अंक प्राप्त कर सकते हो.

यदि आप ऐसे ही सभी विषयों के Chapterwise Important Questions उत्तर चाहते हैं तो हमारे वेबसाइट www.jharkhandlab.com से जुड़े रहे.

विद्यार्थी इसका उत्तर स्वयं करें। ये सारे प्रश्न आपके परीक्षा में बार – बार पूछे जा रहे है। इसमें आपको सभी chapter का अलग-अलग पिछले 16 से 17 वर्षों के महत्वपूर्ण प्रश्न मिलेंगे। यानि 2006-2022 इसमें आपको ये भी बताया जा रहा है कि कौन से प्रश्न किस तरह से एवं कितने marks के पूछे जा रहें है.

यदि वैसे छात्र छात्राएं जो प्रश्नों के उत्तर नहीं कर पाते हैं, वो कुछ दिन प्रतीक्षा करें. आप यहाँ से Questions-answers डाउनलोड कर सकते हैं.

JAC 12th Physics Ch 11 Important Questions

🏢Name of the Organization	Jharkhand Academic Council, Ranchi
🗂️Category	Physics PYQs
✍️Years	2006-2023
👨‍🎓Class	12th
📋Exam Mode	Offline
📒Stream	Science
📑Subject	Physics
📝Chapter	11. Dual Nature of Matter and Radiation
🌐official website	jac.jharkhand.gov.in
💖Telegram	join us

JAC 12th Physics Previous years Important Questions

Q1. An electron has a kinetic energy of 15eV. Calculate its velocity. (Mass of electron = 9.1×10^-31 kg, charge on the electron is 1.6 × 10^-19C) (2006)
Q2. What potential difference must be applied to stop the fastest photoelectrons emitted by a nickel preface under the action of uv light of wavelength 3500 A? The work function of nickel is 5.01eV. (2006)

Q3. What is photoelectric effect? (2007)
Q4. Derive an expression for the de-Broglie wave length of an electron moving under a potential difference V. (2007)
Q5. What is the principle of a photo cell?(2008)

Q6. What potential difference must be applied to stop the fastest photoelectrons emitted by a nickel preface under the action of uv light of wavelength 1900 A? The work function of nickel is 5.0eV. (2008)
Q7. Define work function. (2009)
Q8. Establish the relation between the de-Broglie wavelength of a particle its mass m and energy E. (2009)
Q9. What is the velocity of a photon?(2010)
Q10. Derive Einstein’s photoelectric equation. (2010)

Q11. What is de-Broglie’s hypothesis? Obtain an expression for de-Broglie wavelength .(2011)
Q12. Write Einstein’s Photoelectric equation and explain each term involved in it. (2012, 2016)
Q13. Calculate the frequency of a Photon with energy 7.5eV.(h=6.62×10^-34) (2012)
Q14. The work function of a metal surface is 1.2eV. Calculate the kinetic energy of the fastest and slowest photoelectrons and the retarding potential when light of frequency 5.5 × 10¹⁴ Hz falls on the surface.(2013)

Q15. Wavelength of matter wave is given by -(2013)
a.λ=h/p
b. λ=p/h
c. h=λ×p
d. λ= h²/p²
Q16. Establish Einstein formulas for Photoelectric effect. A photon of energy 2eV is incident on a metal surface of work function 0.8eV. Find the stopping potential. (2014)
Q17. Find the energy of a yellow Photon in eV. Wavelength for yellow light = 6000A.(2015)
Q18. With the reference to Photoelectric effect, define the term work function, threshold frequency and stopping potential. (2017)

Q19. Energy of a photon of wavelength λ is- (2017)
a. hcλ
b. hc/λ
c. hλ/c
d. h/cλ
Q20. What are de-Broglie wavelength? Calculate the de-Broglie wavelength of a photon of momentum 2.55×10^-22 kgm/s. (h=6.6×10^-34 Js) (2018)
Q21. Light of frequency 7.21 ×10¹⁴ Hz is incident on a metal surface. Electrons with a maximum speed of 6.0 × 10^5 m/s are ejected from the surface. What is the threshold frequency of Photoemission of electrons? (2019)

Q22. What is photoelectric effect? Define threshold frequency and stopping potential. (2020)
Q23. If the maximum kinetic energy of photoelectrons is 3eV, then what is ita stopping potential? (2022)
Q24. Define photoelectric effect and derive Einstein’s Photoelectric equation. (2022)

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