Posted by “Moving Charges and Magnetism” is an essential chapter in the RBSE Class 12 Physics syllabus. This chapter delves into the principles of electromagnetism, which form the basis of modern technology, including electric motors, generators, and magnetic field applications. Understanding this chapter helps students strengthen their conceptual knowledge and solve real-life physics problems effectively.
Table of Contents
Key Topics Covered in Chapter 4
- Concept of Magnetic Field
- Definition and representation of magnetic fields.
- Biot-Savart law and its application to find the magnetic field due to a current-carrying wire.
- Ampere’s Circuital Law
- Explanation and application of Ampere’s law.
- Magnetic field calculation in solenoids and toroids.
- Force Between Two Parallel Current-Carrying Conductors
- Concept of attraction and repulsion between conductors.
- Definition of the ampere as a unit of current.
- Moving Coil Galvanometer
- Working principle and design.
- Conversion to ammeters and voltmeters.
- Cyclotron
- Construction and working of the cyclotron.
- Application of cyclotron in physics and medicine.
Benefits of Using RBSE Solutions
- Comprehensive Explanation
- Step-by-step solutions to textbook problems, ensuring better understanding of the concepts.
- Exam-Focused Content
- Solutions tailored to RBSE exam patterns to maximize marks.
- Simple Language
- Easy-to-understand explanations for complex topics, suitable for self-study.
- Practical Applications
- Illustrations of real-life applications of magnetic fields and electromagnetism principles.
Sample Questions with Solutions
Q1: Derive the expression for the magnetic field at the center of a circular loop carrying current III.
Solution: Using the Biot-Savart law, the magnetic field is given by:
B=μ0I2RB = \frac{\mu_0 I}{2R}B=2Rμ0I
Where μ0\mu_0μ0 is the permeability of free space and RRR is the radius of the loop.
Q2: State and explain Ampere’s circuital law.
Solution: Ampere’s law states that the line integral of the magnetic field B⃗\vec{B}B around a closed loop is equal to μ0\mu_0μ0 times the total current III enclosed:
∮B⃗⋅dl⃗=μ0I\oint \vec{B} \cdot d\vec{l} = \mu_0 I∮B⋅dl=μ0I
Q3: What is a cyclotron, and how does it work?
Solution: A cyclotron is a device used to accelerate charged particles to high speeds using a combination of electric and magnetic fields. The particles move in a circular path and gain energy with each rotation.
Tips for Students
- Focus on derivations and formulas like Biot-Savart law and Ampere’s law.
- Practice numerical problems for better understanding.
- Use diagrams to illustrate answers, especially for devices like the moving coil galvanometer and cyclotron.
FAQs
Q1: What is the significance of Biot-Savart law?
A1: The Biot-Savart law is used to calculate the magnetic field at a point due to a current-carrying conductor.
Q2: How is a moving coil galvanometer converted to an ammeter?
A2: By connecting a low-resistance shunt in parallel with the galvanometer.
Q3: What are the applications of a cyclotron?
A3: Cyclotrons are used in medical treatments (radiotherapy), nuclear physics experiments, and isotope production.
- RBSE Solutions for Class 12 Physics Chapter 4 – Moving Charges and Magnetism
- RBSE Solutions for Class 12 Physics Chapter 3: Current Electricity
- RBSE Solutions for Class 12 Physics Chapter 2: Electrostatic Potential and Capacitance
- Rbse Class 12 Physics Chapter 1: Electric Charges and Fields Solution
Conclusion
RBSE Solutions for Class 12 Physics Chapter 4 – Moving Charges and Magnetism are indispensable resources for students preparing for board exams. They help build a strong foundation and provide insights into practical applications of magnetism and current. By mastering this chapter, students can excel in both theoretical and numerical problems, ensuring a high score in the Physics examination.