In Physics, various symbols or notations are used to denote different quantities. The denotations make the representation of the quantities easier. In this article, some of the most popular physics symbols are mentioned.

It is interesting to note that some physics symbols are very relatable (like “d” for distance) while some are unrelatable (like “c” for the speed of light). Below is an elaborate list of the most commonly used symbols in physics with their SI units. It should be noted that a particular symbol might relate to more than one quantity.

### Physics Symbols for Some Basic Quantities:

Physical Quantity |
Symbol(s) |
Symbol Name |
Scalar/ Vector |
SI Unit |
---|---|---|---|---|

Mass | m | – | Scalar | Kilogram (Kg) |

Time | t | – | Scalar | Seconds (s) |

Distance, Length | l, d, r | – | Scalar | Meter (m) |

Area | A | – | Scalar | m^{2} |

Volume | V | – | Scalar | m^{3} |

Density | D | – | Scalar | kg/m^{3} |

Temperature | T | – | Scalar | Kelvin (K) |

Frequency | f, v |
– | Scalar | Hertz (Hz) |

Heat | Q | – | Vector | Joule (J) |

Specific Heat Capacity | c | – | Scalar | J kg^{−1} K^{−1} |

Wavelength | λ | lambda | Scalar | meter (m) |

Angular Displacement | θ | theta | Scalar | Radian (rad) |

Speed of light & sound | c | – | Scalar | m/s |

Angular frequency | ω | omega | Pseudovector | Radian per second (rad/s) |

### Physics symbols in Mechanics:

Physical Quantity |
Symbol(s) |
Symbol Name |
Scalar/ Vector |
SI Unit |

Velocity | v | – | Vector | m/s |

Acceleration | a | – | Vector | meters per second squared (m/s^{2}) |

Angular acceleration | α | alpha | Vector | radian per second squared (rad/s^{2}) |

Momentum | p | – | Vector | kg⋅m/s |

Period | T | – | Scalar | S or sec |

Force | F | – | Vector | Newton (N) |

Torque | T | tau | Vector | N⋅m |

Power | P | – | Scalar | Watt (W) |

Mechanical Work | W | – | Scalar | Joule (J) |

Energy | E | – | Scalar | Joule (J) |

Pressure | p | – | Scalar | Pascal (Pa) |

Moment of Inertia | I | – | Scalar | kg m2 |

Angular Momentum | L | – | Vector | kg⋅m^{2}s^{-1} |

Friction | f | – | Vector | Newton (N) |

Coefficient of Friction | µ | mu | Scalar | unitless |

Kinetic Energy | K | – | Scalar | Joule (J) |

Potential Energy | U | – | Scalar | Joule (J) |

### Physics Symbols in Electricity & Magnetism:

Physical Quantity |
Symbol(s) |
Symbol Name |
Scalar/ Vector |
SI Unit |
---|---|---|---|---|

Charge | q, Q | – | scalar | Coulomb (C) |

Current | I | – | scalar | Ampere (A) |

Resistance | R | – | scalar | Ohms (Ω) |

Inductance | L | – | scalar | Henry (H) |

Capacitance | C | – | scalar | Farad (F) |

Electric Potential Difference | V | – | scalar | Volt (V) |

Electric Field | E | – | vector | Newton per coulomb (N C^{-1}) |

Magnetic Field | B | – | scalar | Tesla |

These were a few important physical quantities along with their symbols. Students are suggested to remember the symbols properly along with their SI units. Visit SI units list to know the units of some of the most important units.

## Watch the video to find out what base measurements are?

Keep visiting BYJU’S to get more such information. BYJU’S also helps the students for their exams by providing sample papers, question papers and preparation tips.

nice

yes this is a good site

Best site ever

This is the best site for study

I like this site

I like this site very much . My main doubt in physics is symbols of physical quantity and their units. Now I understood all this . Thank you so much.

This site is just amazing it gives us extra knowledge

Wow this website is so nice

It’s very easy for learning

This site is very helpfull for learning

So helpful website

Yes this is most useful for student.

Thanks lot

This site is very helpful!

It is very helpful to us and for other classes also