WORLD OF PHYSICS

Class 12 CBSE Physics Chapter: Magnetic Effects of Current as per the latest CBSE syllabus: Magnetic Effects of Current 1. Introduction Electric current produces a magnetic field. This magnetic field can exert a force on magnets and other current-carrying conductors. 2. Oersted’s Experiment Observation : When current flows through a wire, it deflects a nearby magnetic compass needle. Conclusion : A current-carrying conductor produces a magnetic field around it. 3. Magnetic Field Due to a Current (a) Magnetic Field due to a Straight Current-Carrying Conductor The field lines are concentric circles centered on the wire. Direction : Given by the Right-Hand Thumb Rule . Magnitude at a distance r from a long straight wire: B = μ 0 I 2 π r B = \frac{\mu_0 I}{2\pi r} Where: μ 0 = 4 π × 10 − 7   T \cdotp m/A \mu_0 = 4\pi \times 10^{-7} \, \text{T·m/A} (permeability of free space) I I = current, r r = radial distance (b) Magnetic Field due to a Circ...

Full notes on Class 12th Physics Chapter Current Electricity for CBSE Board: Chapter : Current Electricity 1 Introduction Electric current is the flow of electrons through a conductor. It is measured in amperes (A). 2 Electric Current Electric current is defined as the rate of flow of electric charge. Mathematically, it is represented as: I = Q/t where I is the electric current, Q is the electric charge, and t is the time. 3 Electric Circuit An electric circuit is a path through which electric current flows. It consists of a conductor, a switch, and a source of emf. 4 Ohm's Law Ohm's law states that the electric current flowing through a conductor is directly proportional to the potential difference across it, provided the temperature remains constant. Mathematically, it is represented as: V = IR where V is the potential difference, I is the electric current, and R is the resistance. 5 Resistance Resistance is the opposition to the flow of electric current. It depends on the le...

Here's an introduction to Electrostatics Potential and Capacitance for Class 12th: Electrostatic Potential Electrostatic potential, also known as electric potential, is the potential difference between two points in an electric field. It is a measure of the work done in moving a unit positive charge from one point to another against the electric field. Key Points Definition : Electrostatic potential (V) is the work done (W) in moving a unit positive charge (q) from infinity to a point in an electric field. Unit: The unit of electrostatic potential is Volt (V). Formula : V = W/q Capacitance Capacitance is the ability of a conductor to store electric charge. It is a measure of the amount of charge that can be stored in a conductor for a given potential difference. Key Points Definition  : Capacitance (C) is the ratio of the charge (Q) stored in a conductor to the potential difference (V) across it. Unit : The unit of capacitance is Farad (F). Formula  : C = Q/V Types of Capacit...

A syllabus is like a roadmap for both students and teachers. Here's why it's important: 1. Guidance: It outlines what students will be learning throughout the year, giving them a clear path to follow. This helps students stay focused and understand what's expected of them. 2. Organization: A syllabus helps teachers organize their lessons and materials. It ensures that they cover all the necessary topics and meet educational standards. 3. Transparency: It provides transparency to students about course expectations, grading criteria, and classroom policies. This helps create a fair and consistent learning environment. 4. Accountability: A syllabus holds both students and teachers accountable for their roles in the learning process. Students know what they need to do to succeed, and teachers are responsible for delivering the curriculum effectively. 5. Communication: It serves as a communication tool between teachers, students, and parents. It can include contact information...