TABLE OF CONTENTS A detailed explanation of the quantities and symbols is included in the text for each equation, table and figure. It cannot be avoided that some symbols and subscripts are used for different physical quantities. It should be noted that e.g., using the symbol J for the current density cannot be mixed up with the symbol J for the second mechanical moment, as both symbols will not occur in the same equations and even not in a similar context.
Symbols for quantities
| A | Aperiodic current | |
| C | Capacitance | |
| D | Geometric mean distance, geometric factor | |
| E | Young's modulus | |
| E | Matrix of unity | |
| E | Voltage | |
| F | Mechanical force | |
| G | Conductance | |
| I | Current | |
| J | Current density | |
| K | Factor | |
| L | Inductance | |
| M | Mutual impedance | |
| P | Active power | |
| Q | Reactive power | |
| Q | Thermal heat | |
| R | Resistance | |
| S | Apparent power | |
| T | Total time, time constant | |
| U | Voltage | |
| X | Reactance | |
| Y | Admittance | |
| Z | Impedance | |
| Z | Section moduli | |
| a | Distance | |
| a; a 2 | Complex operational phasor | |
| c | Voltage factor | |
| d | Distance, diameter | |
| d | Damping factor | |
| f | Frequency | |
| h | Conductor height | |
| k | Factor | |
| l; ? | Length | |
| m | Mass | |
| n | Number | |
| p | Control range | |
| q | Cross-section | |
| q | Factor of plasticity | |
| q | Factor | |
| r | Radius | |
| r | Reduction factor | |
| s | Conductor sag | |
| t | Time instant | |
| t | Transformation ratio | |
| v |
