## List of Symbols and notations

A, B ... | points in space, curves, surfaces and solids |

A , B ... |
phasor |

A, B ... a, b ... | units |

, ... , ... | variables or vectors modules |

, ... , ... | vectors |

, ... , ... | unit vectors |

dot product between vectors | |

vector product of vectors | |

Average value of the function | |

rms value of the periodic function | |

maximum value of the sine function | |

, ... | derivatives of function with respect to |

, ... | derivatives of function with respect to time |

or | Laplace transform of function |

acceleration | |

area of a surface | |

A | ampere (SI unit of current) |

acceleration vector | |

magnetic field | |

electrical capacity | |

C | coulomb (SI unit of charge) |

speed of light | |

c | centi prefix (10 ^{-2} ) |

distance | |

d | deci prefix (10 ^{-1} ) |

electric field | |

elementary charge | |

e | Euler number (base of the natural logarithm) |

dielectric strength | |

eV | electron-volt (energy unit) |

force | |

F | farad (SI unit of capacity) |

frequency | |

G | gauss (magnetic field unit); Giga prefix (10 ^{9} ) |

gravity field | |

g | gram (SI unit of mass) |

transfer function; frequency response function | |

H | henry (SI unit of inductance) |

Planck's constant | |

electric current | |

i | imaginary number |

unit vectors along the Cartesian axes , and | |

J | joule (SI unit of work and energy) |

dielectric constant | |

K | kelvin (SI unit of temperature) |

Coulomb's constant | |

k | prefix kilo (10 ^{3} ) |

magnetic constant | |

kg | kilogram (SI unit of mass) |

inductance; length | |

mutual inductance | |

M | Mega prefix (10 ^{6} ) |

mass | |

m | meter (SI unit of length) |

N | newton (SI unit of force) |

Unit vector normal to a surface | |

n | prefix nano (10 ^{-9} ) |

momentum | |

power | |

P | prefix pico (10 ^{-12} ) |

, | electric charge |

electrical resistance; radius of a sphere. | |

, , | cylindrical coordinates |

, , | unit vectors of cylindrical coordinates |

position vector | |

, , | spherical coordinates |

, , | unit vectors of spherical coordinates |

position in the path; the frequency domain in the Laplace transform. | |

s | second (SI unit of time) |

period of a sine wave; temperature | |

T | tesla (SI unit of magnetic field); prefix tera (10 ^{12} ) |

time | |

, | time constants |

electric potential energy | |

gravitational potential energy | |

unit step function | |

potential | |

V | volt (SI unit of electric potential) |

velocity vector | |

work | |

W | watt (SI unit of power) |

reactance | |

, , | Cartesian coordinates |

impedance | |

temperature Coefficient | |

increment of the variable | |

voltage | |

Dirac delta function | |

electromotive force (emf) | |

back emf | |

electric flux | |

magnetic flux | |

initial phase | |

linear charge density; wave-length | |

magnetic permeability | |

μ | prefix micro (10 ^{-6} ) |

relationship between the length of a circle to its diameter | |

charge density; resistivity | |

surface charge density | |

angular velocity | |

angular frequency | |

Ω | ohm (SI unit of resistance) |

° | degree (angle unit) |

W | degree Celsius (temperature unit) |