Topic Tree
Electrostatic Potential and Capacitance
- Introduction
- Concept of potential energy and conservative forces
- Work done in moving a charge in electrostatic field
- Electrostatic Potential
- Definition and significance
- Potential at a point from infinity
- Potential Due to a Point Charge
- Derivation using work-energy principle
- Sign of potential based on charge sign
- Potential Due to an Electric Dipole
- Superposition principle
- Potential expressions in axial and equatorial positions
- Dipole potential vs point charge potential
- Potential Due to a System of Charges
- Superposition of individual potentials
- Continuous charge distribution
- Spherical shell potentials (inside & outside)
- Equipotential Surfaces
- Definition and examples (point charge, dipole, uniform field)
- Properties and relation to electric field
- Equipotential maps
- Potential Energy of a System of Charges
- Two-charge system
- Three-charge system and generalization
- Work done by external forces
- Potential Energy in an External Field
- Single charge in external potential
- Two charges in external field
- Dipole in uniform field and energy expression
- Electrostatics of Conductors
- Properties of conductors
- Shielding and surface field expressions
- Electrostatic field inside cavities
- Dielectrics and Polarisation
- Polar and non-polar molecules
- Induced dipole and alignment in field
- Polarisation vector and susceptibility
- Capacitors and Capacitance
- Definition and types
- Capacitance expression and units
- Physical significance
- Parallel Plate Capacitor
- Derivation of capacitance
- Fringing effects
- Dependence on geometry
- Effect of Dielectric on Capacitance
- Field reduction and potential change
- Dielectric constant (K)
- Permittivity and capacitance relation
- Combination of Capacitors
- Series combination: formula and logic
- Parallel combination: formula and logic
- Energy Stored in a Capacitor
- Energy expressions (½ CV², ½ QV, Q²/2C)
- Energy density in electric field
- Summary
- Key concepts and formulas
- Points to ponder
- Exercises
- Conceptual, numerical, and derivation problems
Notes
1. Important Formulae
2. Introduction on Electrostatic potential
Quiz – Attend the quiz after watching the video.
3. Electrostatic potential and capacitance – part-1
4. Electric potential and capacitance part-2
5. Problems in Electrostatics – Electric dipole and capacitor
NEET-2021 problem in electrostatics
Gauss law and its applications
Electric potential problem
Parallel plate capacitors
Problem based on capacitor
Effect of Dielectric in Capacitors part-1
Effect of Dielectric in Capacitor part-2
