| Section 2.1 |
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| | Change of charge (∆Q, [Q] = C) of a system.
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| | Determination of transported charge: Integral of charge current from t1 to t2. |
| | Determination of temporal change of charge: Integral of rate of change of charge from t1 to t2. |
| | Definition of spatial difference of electrical potential (delta_phi): Later minus earlier value of potential (taken in a chosen direction).
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| | Definition of voltage (U, [U] = V): negative of potential difference.
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Section 2.2 |
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| | Law of balance of electric charge in instantaneous (dynamical) form (for two elements, first one having one flow of charge, second one having three flows). |
| | Junction rule: special case of the law of balance of charge for a junction (node).
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Section 2.3 |
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| | Loop rule: Sum of all potential differences in a closed electric loop equals zero.
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| | More than one process sharing a potential difference.
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Section 2.4 |
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| | Determination of electrical power (power of an electric process, rate at which energy is released or used in an electric process).
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| | Determination of a current of energy related to a flow of electric charge. |
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Section 2.5 |
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| | General voltage–charge relation (capacitive relation) of a capacitor. U_C: capacitive potential difference (voltage), alpha_Q: elastance.
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| | General voltage–charge relation (capacitive relation) of a capacitor. U_C: capacitive potential difference (voltage), C_Q: capacitance.
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| | Energy stored in a capacitor (having C = const.). |
| | Characteristic of a battery with internal resistance R_i. U_o: open circuit voltage, U_B: voltage across terminals.
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| | Resistive flow relation for ohmic transport of charge. U_R: resistive potential difference, G: conductance, R: resistance. |
| | Resistance of wire. l: length of wire, r: cross section of wire, rho_el: resistivity of material.
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| | Ohm's law in general form. j_Q: current density, sigma = 1/rho_el: conductivity of material, dphi_el/dx: gradient of electric potential. |
| | Temperature dependence of resistivity (rho_el). alpha: linear temperature coefficient of resistivity, T: temperature. |
| | Equivalent resistance of a number of resistors in series.
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| | Equivalent resistance of a number of resistors in parallel. |
| | Power of an ohmic resistor.
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| | Transport of charge in diodes. U_D: voltage across diode, I_0: saturation current, n: emission coefficient (between 1 and 2). e: elementary charge (1.60·10–19 C), k = 1.38·10–23 J/K is Boltzmann’s constant. T: absolute temperature.
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Section 2.6 |
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| | Voltage U_C as a function of time of a capacitor being discharged through a resistor. U_Co: initial capacitive voltage, R: resistance, C: capacitance.
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| | Charging of a capacitor with the help of a battery or other power supply.
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| | Time constant of simple RC system behavior. R: resistance, C: capacitance.
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