Lecture
This lecture covers the calculation of the energy stored in an electrostatic field, focusing on capacitors. The instructor explains how to determine the energy supplied to a capacitor during the charging process, leading to a general formula applicable to any electrostatic field. The lecture delves into the variation of voltage and current over time, illustrating the energy transfer and storage mechanisms in capacitors. By analyzing the energy stored in the capacitor, the instructor derives the formula for energy density and relates it to the electric field. The discussion extends to the density of energy in capacitors and its broader applicability in electromagnetism.