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In this video we will not only deal with the cases of charging a capacitor but also look at the sign problems that can be encountered in the choice of conventions when orienting the circuit. Erratum: at 15:53 you should read and hear R=100 kohms and not 1.0 kohm 0:00 Summary 0:39 Presentation of physical quantities 1:05 Receiver and generator convention 2:19 the capacitor 3:33 note: notation with potential difference 4:14 Ideal voltage generator and direction of current 4:48 Presentation of the charge and discharge circuit with switch 5:38 Mesh law or additivity of voltages 6:30 Establishment of the differential equation (Ohm's law, intensity and charge flow, voltage at the capacitor terminal, tau...) 10:18 Resolution and study of the differential equation (notation in physics, analogy with maths) 15:43 Expression and evolution of the voltage Uc (study of the function and physical meaning) 17:42 Expression of the intensity 19:07 Dimensional analysis of tau=RC