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Electric field and electric potential
This lecture covers the concepts of electric field and electric potential. It starts by discussing electric interactions between charges and the measurement of net forces in the presence of external charges. The concept of electric field is introduced as a tool to describe forces acting on charges, with examples of field calculations for single charges and continuous charge distributions. The lecture also delves into the calculation of electric field lines, equipotential surfaces, and the relationship between potential energy and electric field strength. The importance of potential difference and its measurement in volts is highlighted, along with demonstrations and examples to illustrate these concepts.