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JAC 12th Physics Important Questions 2023 Ch8 Electromagnetic Waves

JAC 12th Physics Important Questions 2023 Ch8: झारखण्ड बोर्ड कक्षा 12th सभी विद्यार्थियों के लिए Physics Unit 5. में Chapter 8 Electromagnetic Waves (EMW) के पिछले वर्षो में जो भी प्रश्न पूछे गए हैं, उनकी चर्चा हम इसमें करेंगे तो इन Important Questions को पढ़ लीजिए.

JAC 12th Physics Important Questions 2023 Ch8 Electromagnetic Waves
JAC 12th Physics Important Questions 2023 Ch8 Electromagnetic Waves 1

रांची: झारखंड एकेडमिक काउंसिल ( JAC Board) कक्षा JAC 12th Physics Important Question के पिछले वर्षों के सभी महत्वपूर्ण प्रश्न (important Questions) आपको यहाँ पर बताए जा रहे है, जो बोर्ड परीक्षा 2023 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 2023 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 (JAC 12th Physics Important Question For Board Exams)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.

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JAC 12th Physics Previous Years Important Questions :

Q1. Arrange the following in ascending order of wavelength : Ultravoilet rays , Microwaves, 𝛾-rays, and radiowaves (1 marks) [JAC – 2006]
Q2. Arrange the following in ascending order of frequency :
Microwaves, 𝛾-rays, Ultravoilet rays and radiowaves (1 marks) [JAC – 2007]

Q3. What is electromagnetic spectrum? What are its main parts? I(2 marks) [JAC – 2008]
Q4. Write an expansion for the speed of electromagnetic waves in a  free space? (1marks) [JAC – 2008]
Q5. What is the wavelength of a radio station, which trasmits signals on 560 MHz frequency. (2 marks) [JAC -2009]


Q6. What are the uses of X-rays, ultravoilet rays and infrared rays ? (3 marks) [JAC – 2011] 
Q7. Why sky waves are not used for transmitting T.V.? (2 marks) [JAC – 2012]
Q8. Write four characteristics of electromagnetic waves? Write the expression for the velocity of electromagnetic waves in the terms of permittivity and magnetic permeability of free space.(3 marks) [2013]


Q9. Which of the following electromagnetic waves has the longest wavelength? (1 marks)
[JAC –2014]
a) X – rays
b) UV rays
c) infrared radiations
d) Micrwaves
Q10. Write a formula for velocity of electromagnetic waves in free  space? What are the differents modes of propagation of electromagnetic waves? (2 marks) [JAC –2014]
Q11. Which of the following has smallest wavelength? (1 mark)
[JAC –2015]
a) Yellow rays
b) 𝑥 − 𝑟𝑎𝑦𝑠
c) 𝛼 − 𝑟𝑎𝑦𝑠
d) 𝛾 − 𝑟𝑎𝑦𝑠
Q12. What are microwaves ?Mention two of its applications. (2 marks) [JAC –2016]


Q13. Speed of electromagnetic waves in a free space is : (1 marks) [JAC – 2016]
a) 𝜇0𝜖0
b) 𝜇0𝜖0
c) 1/ √𝜇0𝜖0
d) 1/𝜇0𝜖0 
Q14. What are electromagnetic waves? Mention two properties of  electromagnetic waves. (2 marks) [JAC – 2017, 2013, 2012, 2007, 2006]
Q15. Directions of propagation of electromagnetic waves is 
(1 marks) [JAC –2017]
a) parallel to 𝐸
b) parallel to 𝐵 
c) parallel to 𝐵 × 𝐸
d) parallel to 𝐸 × 𝐵 
Q16. Mentions two applications each of x-rays and infra-red radiations. (1+1=2marks) [JAC –2018]


Q17. Give two uses of each of ultravoilet rays and microwaves.  (1+1=2marks) [JAC –2019]
Q18. Which one of the following has maximum penetrating power? (1 mark) [JAC –2019]
A) ∝ −𝑟𝑎𝑦𝑠
b) 𝛽 − 𝑟𝑎𝑦𝑠 
c) 𝛾 − 𝑟𝑎𝑦𝑠
d) cathod rays 


Q19. Name six types of electromagnetic waves in ascending order in term of their wavelength. [JAC –2020(2 marks), 2010(3 marks)]

Q20. Electromagnetic Waves can be deflected by (1 marks) [JAC- 2020]
a) Electric field only
b) Magnetic field only
c) Both electric and magnetic field
d) None of these
Q21. State any property of electromagnetic waves.(2022)

Q22. Mention to applications of microwaves, X-Ray and ultraviolet radiations.(2022)

JAC 12th Physics Important Questions Chapterwise List :

UnitsPhysicsImportant Questions
1.1. Electric Charges and FieldsClick Here
2. Electric Potential and CapacitanceClick Here
2.3. Electric currentClick Here
3.4. Moving Charges and Magnetism
5. Magnetism and Matter
Click Here
4.6. Electromagnetic InductionClick Here
7. Alternating CurrentClick Here
5.8. Electromagnetic WavesClick Here
6.9. Ray Opticscoming soon
10. wave Opticscoming soon
7. 11. Dual Nature of Radiation and MatterComing Soon
8.12. Atoms
13. Nuclei
Click Here
9.14. SemiconductorsComing Soon
10.15. CommunicationComing Soon
JAC 12th Physics Important Questions 2023

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