Electrostatic Phenomena and Electric Current
This page covers capacitance, electric current, and Kirchhoff's laws. It provides formulas for calculating capacitance and current in various scenarios.
Capacitance is defined as the ratio of charge to potential difference: C = Q/V. For a parallel plate capacitor, C = ε₀A/d, where A is the plate area and d is the separation.
Definition: Kirchhoff's first law states that the sum of currents entering a node equals the sum of currents leaving it.
The page also introduces Ohm's law: V = IR, relating voltage, current, and resistance.
Highlight: Kirchhoff's second law states that the sum of potential differences around any closed loop in a circuit is zero.
The power dissipated in a resistor is given by P = I²R. For a power source, P = IV.
Vocabulary: Electromotive force emf is the energy supplied per unit charge by a power source.
The page concludes with a reminder of the principle of conservation of energy and its application to electrical systems.