The following table shows the units and symbols for a series of quantities that you will meet in Physics. Sometimes the symbol for the quantity is given and sometimes the symbol for the unit which ever is the more appropriate.

Quantity | Unit | Symbol |

activity (of a radioactive source) | becquerel | Bq |

amount of substance | mole | mol |

angular momentum | Js | L |

atomic mass | atomic mass unit | u |

capacitance | farad (F) | C |

current density | Am^{-1} |
j |

electric charge | coulomb | C |

electric potential difference | volt | V |

electromotive force | volt | V |

electric conductance | siemens | S |

electric capacitance | farad | F |

electric current | ampere | A |

electric potential difference | volt | V |

electric field strength | NC^{-1} or Vm^{-1} |
S |

electric resistance | ohm | Ω |

electrical conductivity | Sm^{-1} |
σ |

electrical resistivity | Ωm | ρ |

force | newton | N |

frequency | hertz | Hz |

gravitational constant | Nm^{2}kg^{-2} |
G |

gravitational field strength | Nkg^{-1} |
g |

gravitational potential | Jkg^{-1} |
V |

inductance (L) | henry | H |

length | metre | m |

luminance | lux | lx |

luminous flux | lumen | lm |

luminous intensity | candela | cd |

magnetic flux density | tesla | T |

magnetic flux (magnetic induction) | weber | W |

mass | kilogram | kg |

moment of a force (torque) | Nm | M |

moment of inertia | kgm^{2} |
I |

momentum | Ns | P |

permeability | Hm^{-1} |
μ |

permittivity | Fm^{-1} |
ε |

power | watt | W |

presure and stress | pascal | Pa |

specific heat capacity | Jkg^{-1}K^{-1} |
c |

specific latent heat | Jkg^{-1} |
L |

surface tension | Nm^{-1} |
s |

thermal conductivity | Wm^{-1}K^{-1} |
k |

thermodynamic temperature | kelvin | K |

time (t) | second> | s |

viscosity | Ns^{-2} |
h |

work, energy, heat | joule | J |

Young modulus | Pa | E |