JAC 12th Physics Important Questions Chapter 6: Electromagnetic Induction

JAC 12th Physics Important Questions [Unit 4.] Exam: झारखण्ड बोर्ड कक्षा 12th सभी विद्यार्थियों के लिए Physics Unit 4. में Chapter 6. Electromagnetic Induction के पिछले वर्षो में जो भी प्रश्न पूछे गए हैं, उनकी चर्चा हम इसमें करेंगे तो इन Important Questions को पढ़ लीजिए.

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 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 में अच्छे अंक प्राप्त कर सकते हो.

यदि आप ऐसे ही सभी विषयों के Chapterwise 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.

JAC 12th Physics Previous Years Important Questions

Q1. Explain Lenz’s law. (2006)
Q2. What are the various energy losses causes a transformer? How are they reduced? (2006)
Q3. State Faraday’s law of electrolysis. (2007)
Q4. State and explain Faraday’s laws of electromagnetic induction. (2007, 2008, 2009, 2011, 2013)
Q5. What is mutual induction? Explain. (2008)

Q6. What are eddy currents?(2009)
Q7. What is Lenz’s law? Show that Lenz’s law is in accordance with the law of conservation of energy. (2009)
Q8. What do you mean by electromagnetic induction? (2010)
Q9. State Lenz’s law. On which law of conservation does it depend? (2010, 2012)
Q10. What is Eddy current ? Write its uses. (2011, 2019)
Q11. State Lenz’s laws of electromagnetic induction. Does it violate the law of conservation of energy? (2012)
Q12. The dimensional formula of mutual inductance is – (2012)
a. ML²/T²A²
b. ML^-2T²A²
c. ML²T^-2A²
d. None of these

Q13. What do you understand by self and mutual induction? Define mutual inductance. (2013, 2016)
Q14. Henry is a unit for -(2014)
a. Self-inductance
b. Mutual inductance
c. Both a and b
d. None of these
Q15. What do you mean by electromagnetic induction? Find a formula for emf induced in a coil rotating in a uniform magnetic field. What is Lenz’s law? (2014)
Q16. What is transformer? Describe with the principle, the construction and working of a transformer. (2014, 2020)
Q17. The core of a transformer is laminated. Why?(2015, 2017)
Q18. ”Lenz’s law is in accordance with the law of conservation of energy. ” Explain. Find the mutual inductance of two long co-axial solenoids. (2015)

Q19. Derive an expression for the emf induced in a coil rotating uniformly in a uniform magnetic field. Mention the nature of this emf. (2016)
Q20. Derive an expression for the self – inductance of a long solenoid carrying current. (2018)
Q21. State Faraday’s law of electromagnetic induction. Find the mutual inductance between two long co-axial solenoid. (2019)
Q22. Define coefficient of self induction and coefficient of mutual induction? (2020)

Last Year 2022 Objective Questions-

Q23. The role of self – inductance is equivalent to –
a. momentum
b. force
c. energy
d. inertia
Q24. Lenz’s law is consequence of the law of conservation of
a. Charge
b. Energy
c. induced emf
d. induced current

Q25. In the given figure current from A to B in the straight wire is increasing. The direction of induced current in the loop is –
a. Clockwise
b. anti-clockwise
c. Changing
d. Nothing can be said
Q26. The unit of inductance is –
a. henry
b. weber
c. newton
d. ohm