Conceptual Questions for Class 12 Physics Chapter 5 Magnetism and Matter

Here we are providing conceptual questions for class 12 physics chapter 5 magnetism and matter. Students are suggested to go through each and every question for better understanding of the chapter.

Q.1. Does a magnetic monopole exist? Justify your answer. How magnetic field is produced?

Solution. No, a magnetic monopole does not exist. The reason is that a magnetic field is produced by a current loop and not by monopole of a magnet.

Q.2. How does the (i) pole strength and (ii) magnetic moment of each part of a bar magnet change if it is cut into two equal pieces transverse to its length?

Solution. (i) Pole strength of each part remains same as that of the original magnet.

(ii) Magnetic moment of each part is half of that of the original magnet because length of each part is halved.

Q.3. What is the origin of the word magnetism?

Solution. The word magnetism (or magnet) is derived from the name of an island in Greece called ‘Magnesia’ where deposits of natural magnet were found as early as the sixth century B.C.

Q.4. Repulsion is the surer test of magnetism. Comment.

Solution. A magnet can attract another magnet or a magnetic substance like iron. However, a magnet can repel another magnet only. So, repulsion is the surer test of magnetism.

Q.5. What is the source of magnetic field (or magnetism)?

Solution. The electrons revolving in atoms behave as current loops. These current loops give rise to magnetism.

Q.6. How are the magnetic field lines different from the electrostatic field lines?

Solution. An electric field line starts from a positive charge and ends on a negative charge and does not form a closed loop. A magnetic field line always forms a closed loop which runs from N-pole to S-pole outside a magnet and from S-pole to N-pole inside a magnet.

Q.7. How does the (i) pole strength and (ii) magnetic moment of each part of a bar magnet change if it is cut into two equal pieces along its length?

Solution. (i) Pole strength of each part becomes half of the original pole strength.

(ii) Magnetic moment of each part becomes half of the original magnetic moment.

Q.8. Why is a current loop considered a magnetic dipole?

Solution. Like a bar magnet, a current loop possesses a magnetic dipole moment (m = IA). Like a bar magnet, a current loop experiences a torque in a magnetic field due to which it aligns its axis parallel to the external magnetic field.

Q.9. What happens when a diamagnetic substance is placed in a varying magnetic field?

Solution. A diamagnetic substance tends to move from stronger to the weaker parts of the varying magnetic field.

Q.10. How does the magnetic induction of a paramagnetic material vary with temperature?

Solution. The magnetic induction of a paramagnetic material decreases with the increase in temperature.

Q.11. Why is diamagnetism independent of temperature?

Solution. The induced dipole moment in a diamagnetic sample is always opposite to the magnetising field, no matter what the internal motion of the atom is.

Importance of conceptual questions for class 12 physics

Conceptual questions are of utmost importance in Class 12 Physics for several reasons. These questions focus on understanding the fundamental principles and concepts rather than just rote memorization of equations and formulas. Here are some reasons why conceptual questions are crucial in Class 12 Physics:

Deep understanding: Conceptual questions require students to grasp the underlying principles and theories behind physical phenomena. This leads to a deeper understanding of the subject, making it easier to apply the knowledge to various problem-solving scenarios.
Critical thinking: When students tackle conceptual questions, they are encouraged to think critically and analytically. These questions often involve complex scenarios that demand logical reasoning and creative thinking to arrive at the right answers.
Problem-solving skills: Conceptual questions challenge students to solve unfamiliar and intricate problems. As a result, their problem-solving skills are honed, preparing them to tackle more advanced scientific challenges in the future.
Application of concepts: By answering conceptual questions, students learn to apply theoretical concepts to practical situations. This bridges the gap between theory and real-world applications, fostering a holistic understanding of Physics.
Better exam preparation: Class 12 board exams and competitive entrance exams often include conceptual questions. Preparing for such questions not only improves performance in exams but also sets a strong foundation for further studies in physics-related fields.
Enhanced retention: Understanding concepts leads to better retention of knowledge. Unlike rote memorization, conceptual understanding stays with students for a long time, making it easier to build on that knowledge in the future.
Encouraging curiosity: Conceptual questions often pique students’ curiosity and encourage them to explore the subject further. This can spark an interest in Physics as a whole, leading to a lifelong passion for the subject.
Formulating connections: Conceptual questions help students make connections between different topics and subfields within Physics. This interconnected knowledge is essential for a comprehensive understanding of the subject.
Learning from mistakes: When students attempt conceptual questions, they may make mistakes. However, these mistakes provide valuable learning opportunities, as they highlight areas that need further clarification and understanding.
Building confidence: Successfully answering conceptual questions gives students a sense of accomplishment and boosts their confidence in their Physics abilities.

Conceptual Questions for Class 12 Physics Chapter 5 Magnetism and Matter

Conceptual Questions for Class 12 Physics Chapter 5 Magnetism and Matter

Importance of conceptual questions for class 12 physics

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