full handwriting notes ch 2

This set of handwritten notes on Electrostatic Potential and Capacitance provides a detailed exploration of how charges interact through potential energy and how capacitors function. It begins with the electric potential energy of systems of charges, showing how work is required to assemble charges from infinity. The concept of electric potential (V) is introduced as work per unit charge, with formulas for point charges, dipoles, rings, discs, and spheres.

The notes emphasize equipotential surfaces, which are always perpendicular to electric field lines, and explain electrostatic shielding, where external fields do not affect charges inside a conductor’s cavity. Important applications include electrostatic pressure on conductors, self-energy of charged spheres, and earthing, which ensures a body’s potential becomes zero.

The second half focuses on capacitors—devices that store charge. It covers spherical, cylindrical, and parallel plate capacitors, their energy storage, and combinations in series and parallel. Finally, the role of dielectrics is explained, including polar and non-polar types, dielectric constant, and how inserting dielectrics changes capacitance and stored energy.