# Ncert 12th Physics Chapter-2

## Energy Stored in a Capacitor

Chapter-2|Electrostatic Potential and Capacitance| NCERT 12th Physics: Energy Stored in a Capacitor: The energy of a charged capacitor is measured by the total work done in charging the capacitor to a given potential. The work done in charging the capacitor is stored as its electrical potential energy. Let we consider a capacitor of capacitance C. […]

## Combination of Capacitors

Chapter-2|Electrostatic Potential and Capacitance| NCERT 12th Physics: Combination of Capacitors: When there is a combination of capacitors in a circuit, we can sometime replace that combination with an equivalent capacitor. The two basic combinations of capacitors which can be replaced by single equivalent capacitor, are Capacitors in Series: When negative plate of one capacitor is

## Effect of Dielectric on Parallel Plate Capacitor

Chapter-2|Electrostatic Potential and Capacitance| NCERT 12th Physics: Effect of Dielectric on Parallel Plate Capacitor: Let a dielectric is inserted between the plates fully occupying the intervening reason. The dielectric is polarized by the electric field due to two metallic positive and negative plates. Since, the direction of Eᵢ (Induced electric field) and E₀ (External electric

## Parallel Plate Capacitor

Chapter-2|Electrostatic Potential and Capacitance| NCERT 12th Physics: Parallel Plate Capacitor: The simplest and the most widely used capacitor is the parallel plate capacitor. It consists of two large plane parallel conducting plates, separated by a small distance.   Electric field due to infinite plane sheet X away from positive charge   If q is the

## Capacitors and Capacitance

Chapter-2|Electrostatic Potential and Capacitance| NCERT 12th Physics: Capacitors and Capacitance: A capacitor is an arrangement of two conductors separated by an insulating medium that is used to store electric charge and electric energy.   Capacitance of Capacitor:  A capacitor consists of two conductor having charges +Q and -Q. The potential difference between them is V=V₁

## Dielectrics and Polarisation

Chapter-2|Electrostatic Potential and Capacitance| NCERT 12th Physics: Dielectrics and Polarisation: In a dielectric under the effect of an external field, a net dipole moment is induced in the dielectric due to molecular dipole moment, a net charge appears on the surface of the dielectric.   These induced charges produce a field opposing the external field.

## Electrostatics of Conductors

Chapter-2|Electrostatic Potential and Capacitance| NCERT 12th Physics: Electrostatics of Conductors: Conductors: Conductors are the materials through which electric charges can flow easily. When a conductor is placed in electrostatic field, the conductors show the following properties. 1. Inside a conductor, electrostatic field is zero. 2. At the surface of a charged conductor, electrostatic field must

## Potential Energy of a Dipole in an External Field

Chapter-2|Electrostatic Potential and Capacitance| NCERT 12th Physics: Potential Energy of a Dipole in an External Field: Let an electric dipole placed in an uniform electric field E with its dipole moment P making an angle θ with electric field. Two equal and opposite charges exerts forces +qE and -qE acts on its two ends. The two forces

## Potential Energy in an External Field

Chapter-2|Electrostatic Potential and Capacitance| NCERT 12th Physics: Potential Energy in an External Field: Potential energy in an external field of a system are as under  Potential Energy of a Single Charge in External Field: If V(r) is the potential at a point due to external field E, Then potential energy of a single charge q

## Electrostatic Potential Energy of a System of Three Point Charges

Chapter-2|Electrostatic Potential and Capacitance| NCERT 12th Physics: Electrostatic Potential Energy of a System of Three Point Charges: Let we consider a system of three point charges q₁, q₂ and q₃ having position vector r₁, r₂ and r₃ respectively. If we bring charge q₁ from infinity to point A, no work is required because there is

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