Chapter 2: Electrostatic Potential and Capacitance
NCERT Class 12 Physics, Part I, Chapter 2. 8 lessons, 16 narrated 3D videos, 10 simulations and 16 quiz questions, following the textbook section by section.
- Electrostatic potentialLift a stone and you store gravitational potential energy. Push two like charges closer together and you do the same thing: you store electrostatic potential energy. Let…
- Potential of a dipole and of many chargesAn electric dipole is a pair of equal and opposite charges: −q at A and +q at B, a distance 2a apart. Its dipole moment p has size q × 2a, and points from −q to +q.
- Equipotential surfacesAn equipotential surface is a surface on which the potential has the same value at every point.
- Potential energy of a system of chargesStart with two charges, q₁ and q₂, far apart at infinity. How much work does it take to put them in place, a distance r₁₂ apart?
- Electrostatics of conductorsA metal is full of free electrons that can drift through it. In electrostatics, every charge has come to rest. That one fact decides how conductors behave.
- Dielectrics and polarisationDielectrics are insulators: glass, mica, paper, water. Unlike metals, they have no free charges. So what happens when we put one in an electric field?
- Capacitors and the parallel plate capacitorA capacitor is two conductors separated by an insulator. Connect them to a battery: one gets a charge +Q, the other −Q, and there is a potential difference V between…
- Combining capacitors and stored energyWe often join several capacitors together. The two simplest ways are in series, one after another, and in parallel, side by side.