Class 12 Physics Important Questions | Chapter 11 Magnetic Materials

Here we have a given Class 12 Physics Important Questions. Every students want to score good marks in Class 12 Board Exam,but number of students don't know how to score good marks. Dear students, given following questions had been asked in earlier Board Examinations. From this post, you will know which questions had been asked in earlier Board Exams and same questions or same type of questions will be asked in your upcoming examination. If you study all these questions, you will get very good marks in your board examinations, Because so many questions from given following questions will be asked in your upcoming examination.so go through our Class 12 Physics Important Questions which are given in chapter-wise manner and simply try to solve these questions to score very good marks in Physics and obviously, you will! Best wishes to all dear students for your upcoming Board Exam 2023.Here we have a given Class 12 Physics Important Questions for Maharashtra Board HSC Examination 2023. Every students want to score good marks in Class 12 Board Exam,but number of students don't know how to score good marks. Dear students, given following questions had been asked in earlier HSC Board Examinations. From this post, you will know which type of questions had been asked in earlier Board Exams and same questions or same type of questions will be asked in your upcoming examination. If you study all these questions, you will get very good marks in your board examinations, Because so many questions from the following given questions will be asked in your upcoming examination.Therefore go through our Class 12 Physics Important Questions which are given in chapter-wise manner and simply try to solve these questions to score very good marks in Physics and obviously, you will! Best wishes to all dear students for your upcoming Maharashtra State Board Exam 2023.

यहां हमारे पास महाराष्ट्र बोर्ड HSC परीक्षा 2023 के लिए कक्षा 12वीं के Physics के महत्वपूर्ण प्रश्न दिए गए हैं। प्रत्येक छात्र कक्षा 12वीं की बोर्ड परीक्षा में अच्छे अंक प्राप्त करना चाहते हैं, लेकिन कई छात्र यह नहीं जानते कि अच्छे अंक कैसे प्राप्त करें। प्रिय छात्रों, नीचे दिए गए प्रश्न पिछले एचएससी बोर्ड परीक्षाओं में पूछे गए थे। इस पोस्ट से आप जानेंगे कि पिछली बोर्ड परीक्षाओं में किस प्रकार के प्रश्न पूछे गए थे और आपकी आगामी परीक्षा में भी इसी प्रकार के प्रश्न पूछे जाएंगे। यदि आप इन सभी प्रश्नों का अध्ययन करते हैं, तो आप अपनी बोर्ड परीक्षाओं में बहुत अच्छे अंक प्राप्त करेंगे, क्योंकि निम्नलिखित दिए गए प्रश्नों में से बहुत सारे प्रश्न आपकी आगामी परीक्षा में पूछे जाएंगे। इसलिए हमारे कक्षा 12 के भौतिकी के महत्वपूर्ण प्रश्नों को देखें जो अध्याय में दिए गए हैं | फिजिक्स में बहुत अच्छे अंक प्राप्त करने के लिए इन प्रश्नों को बुद्धिमान तरीके से हल करने का प्रयास करें और जाहिर है, आप करेंगे! सभी प्रिय छात्रों को आपकी आगामी महाराष्ट्र राज्य बोर्ड परीक्षा 2023 के लिए शुभकामनाएं।


Class 12 Physics Important Questions

Class 12 Physics Important Questions | Chapter 11 Magnetic Materials

• Define magnetization. State its formula and S.I. unit. (March 2013)

• Explain ferromagnetism on the basis of domain theory. (March 2013)

• What is magnetization? (Oct 2013)

• The magnetic susceptibility of annealed iron at saturation is 4224. Find the permeability of annealed iron at saturation. (uo = 4π x 10-7 SI unit). (Oct 2013)

• Show that the orbital magnetic dipole moment of a revolving electron is evr/2. (March 2014)

• The susceptibility of magnesium at 300 K is 2.4 x 10-5. At what temperature will the susceptibility increase to 3.6 x 10-5? (March 2014)

• In a hydrogen atom, an electron carrying charge 'e' revolves in an orbit of radius 'r' with speed v. Obtain an expression for the magnitude of magnetic moment of a revolving electron.
(Oct 2014)

• The magnetic moment of a magnet of dimensions 5 cm x 2.5 cm x 1.25 cm is 3 Am2. Calculate the intensity of magnetization. (Oct 2014)


• Define magnetization. (March 2015)

• An iron rod of area of cross-section 0.1 m2 is subjected to a magnetising field of 1000 A/m. Calculate the magnetic permeability of the iron rod. (Magnetic susceptibility of iron = 59.9, magnetic permeability of vacuum = 4π x 10-7 S.I. unit) (Oct 2015)

• Give any two points of differences between diamagnetic and ferromagnetic substances. (Oct 2015, March 2016, July 2017)

• The susceptibility of magnesium at 200 K is 1.8 x 10-5. At what temperature will the Susceptibility decrease by 6 x 10-6? (March 2016)

• Draw the diagrams showing the dipole moments in paramagnetic substance when external magnetic field is
i. absent
ii. strong. (July 2016)

• The susceptibility of magnesium at 300 K is 1.2 x 10-2. At what temperature will the susceptibility increase to 1.8 x 10-5? (July 2016)

• An electron in an atom revolves around the nucleus in an orbit of radius 0.53 A°. If the frequency of revolution of an electron is 9 x 109 MHz, calculate the orbital angular momentum. (Given: Charge on an electron = 1.6x 10-19 C Gyromagnetic ratio = 8.8 x 1010 C/kg, π = 3.142) (March 2017)

• Find the magnetization of a bar magnet of length 10 cm and cross-sectional area 4 cm2, if the magnetic moment is 2 Am2. (July 2017)

• Define magnetization. Write its SI unit and dimensions. (March 2018)

• What is Curie temperature and what happens above Curie temperature? (July 2018)

• What happens to a ferromagnetic substance heated above Curie temperature? (March 2019)

• The susceptibility of magnetism at 300 K is 1.2 x 10-5. What will be its susceptibility at 200 K? (March 2019)

• What happens if the rod of dia-magnetic material is placed in a nonuniform magnetic field? (July 2019)

• The susceptibility of magnesium at 300 K is 1.2 x 10-5. At what temperature will the susceptibility decrease to 0.4 x 10-5? (July 2019)

• Derive an expression for magnitude of magnetic dipole moment of a revolving electron. (March 2020)


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