Electrostatics — Class 12 Maharashtra HSC Physics revision notes
A 7-page visual revision sheet for Electrostatics, written for Class 12 Maharashtra HSC Physics. Formulas, diagrams and the traps that cost marks, laid out to be read the night before rather than the term before. Free, and it opens inside CapCompass.
What this Electrostatics sheet covers
- gauss's law
- gaussian surface
- Extending Gauss's law
- charged spherical shell
- Field of a uniformly charged spherical shell
- outside the shell, r>R
- on the surface, r=R
- inside the shell, r<R
- infinite straight charged wire
- infinite plane sheet
- Field of an infinite wire and an infinite sheet
- infinite line, linear density lambda, cylindrical Gaussian surface
- infinite plane sheet, surface density sigma, pillbox Gaussian surface
- Reading the three standard results
- electric potential
- potential difference
- Electrostatic potential
- potential energy per unit charge
- potential difference, work done per unit charge
- field is the negative gradient of potential
- Potential due to a point charge, and superposition
- potential energy
- system of charges
- Potential energy of a system of charges
- two charges, separated by r
- N point charges, sum over every pair
- single charge q sitting at potential V of an external field
- dipole potential
- potential due to a dipole
- Potential due to an electric dipole
- general point, angle theta from the dipole axis
- on the axis, theta=0 (towards +q)
- on the equator, theta=90 degrees
- Axial vs equatorial potential
- On the axis
- On the equator
- dipole in a uniform field
- torque on a dipole
- Potential energy of a dipole in a uniform field
- equipotential surface
- Equipotential surfaces
- conductor
- electrostatic shielding
- Conductors under electrostatic conditions
- Polar vs nonpolar dielectrics
- Polar dielectrics
- Nonpolar dielectrics
- dielectric constant
- dielectric strength
- Polarisation reduces the net field
- capacitance
- parallel plate capacitor
- defining ratio, constant for a given conductor pair
- parallel plate capacitor, plate area A, separation d
- SI unit and common submultiples
- spherical capacitor
- cylindrical capacitor
- Capacitance of other shapes
- spherical capacitor, inner radius a, outer radius b
- cylindrical capacitor, length l, radii a and b
- n parallel plates, alternately connected
- dielectric slab
- capacitance with dielectric
- Capacitance with a dielectric slab
- slab of thickness t<d, dielectric constant k, filling part of the gap
- slab fills the entire gap, t=d
- slab replaced by a conducting sheet, k to infinity
- Capacitors in series vs parallel
- Series
- Parallel
- energy stored in a capacitor
- in terms of Q and C
- in terms of C and V
- in terms of Q and V
- displacement current
- van de graaff generator
- Symbols
- Traps that cost marks
- Tricks that save time
How CapCompass uses this sheet
These notes are not a standalone PDF. CapCompass plans Physics chapter by chapter against your real exam dates and free hours, and when the plan reaches Electrostatics the sheet opens inside the study block itself — at the page covering the sub-topic that block is on, with the timer still running. Revision arrives at the moment the plan says revise, instead of having to be gone looking for.
More Physics Class 12 revision notes
- AC Circuits
- Current Electricity
- Dual Nature of Radiation and Matter
- Electromagnetic Induction
- Kinetic Theory of Gases and Radiation
- Magnetic Fields due to Electric Current
- Magnetic Materials
- Mechanical Properties of Fluids
- Oscillations
- Rotational Dynamics
- Semiconductor Devices
- Structure of Atoms and Nuclei
- Superposition of Waves
- Thermodynamics
- Wave Optics