Class 12 Physics Important Questions | Chapter 10 Magnetic Fields Due To Electric Current

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 | Chapter 10 Magnetic Fields Due To Electric Current


• Give the construction of a suspended coil type moving coil galvanometer. (March 2009)

• State Ampere's law. Derive an expression for the magnetic induction at a point due to a long straight current-carrying conductor. (March 2009)

• Explain the principle of moving coil galvanometer. (March 2010)

• State the principle of moving coil galvanometer and explain its working. (March 2011)

• State Ampere's circuital law and write its mathematical expression. (Oct 2011)

• In a cyclotron, magnetic field of 3.5 Wb/m2 is used to accelerate protons. What should be the time interval in which the electric field between the dees be reversed? [Mass of proton = 1.67 x 10-27 kg, Charge on proton = 1.6 x 10-19 C]. (March 2013)

• A circular coil of 250 turns and diameter 18 cm carries a current of 12 A. What is the magnitude of magnetic moment associated with the coil? (March 2013)

• State Ampere's circuital law. Obtain an expression for magnetic induction along the axis of toroid. (March 2014)

• Show that the current flowing through a moving coil galvanometer is directly proportional to the angle of deflection of coil. (Oct 2014)


• Draw a neat and labelled diagram of suspended coil type moving coil galvanometer (March 2015)

• A solenoid 3.142 m long and 5.0 cm in diameter has two layers of windings of 500 turns each and carries a current of 5 A. Calculate the magnetic induction at its centre along the axis. (March 2015)

• A circular coil of 300 turns and average area 5 x 10-3 m2 carries a current of 15 A. Calculate the magnitude of magnetic moment associated with the coil. (March 2015)

• Draw a neat labelled diagram for the construction of 'cyclotron'. (March 2016)

• Obtain an expression for magnetic induction along the axis of toroid on the basis of Ampere's circuital law. (July 2017)

• State and explain Ampere's circuital law. (March 2018)

• In a cyclotron, magnetic field of 1.4 Wb/m2 is used. To accelerate protons, how rapidly should the electric field between the dees be reversed? (π = 3.142, Mp = 1.67 x 10-27 kg, e=1.6 x 10-19 C) (March 2018)

• A cyclotron is used to accelerate protons to a kinetic energy of 5 MeV. If the strength of magnetic field in the cyclotron is 2 T, find the radius and the frequency needed for the applied alternating voltage of the cyclotron. (Given: Velocity of proton = 3 x 107 m/s) (March 2019)

• State Ampere's circuital law. Using Ampere's circuital law, obtain an expression for magnetic induction at any point due to a straight conductor carrying current. (July 2019)

• A coil has 'n turns, each of cross-sectional area 1.6 cm2. The axis of the coil is kept inclined at 30° with the direction of uniform magnetic field of induction 2 N/Am. The torque of 0.02 Nm is experienced by the coil, when a current of 1.25 A flows through each turn. Calculate n. (July 2019)

• A moving coil galvanometer (M.C.G.) has 10 turns each of length 12 cm and breadth 8 cm. The coil of M.C.G. carries a current of 125 uA and is kept perpendicular to the uniform magnetic field of induction 10-2 T. The twist constant of phosphor bronze fibre is 12 x 10-9 Nm/degree. Calculate the deflection produced. (March 2020)

• A circular coil of 300 turns and diameter 14 cm carries a current of 15 A. Calculate the magnitude of the magnetic dipole moment associated with the coil. (March 2020)


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