Standard Units In Physics - Advanced

Base quantities

Quantities that cannot be expressed in the form of other quantities

Seven base units

- mass

- length

- time

- temperature

- current

- amount of substance

- luminous intensity

Abbreviation of mass

m

SI unit of mass

kg

Abbreviation of length

l

SI unit of length

metre (m)

Abbreviation of time

t

SI unit of time

s

Abbreviation of current

I

SI unit of current

A

Abbreviation of temperature

T

SI unit of temperature

K

Abbreviation of amount of substance

n

SI unit of amount of substance

mole (mol)

Abbreviation of luminous intensity

Iv

SI unit of luminous intensity

candela (cd)

Derived quantities

Quantities that can be expressed in terms of other quantities

Example of derived units

- Force

- Energy

- Voltage

- Resistance

- Power

- Frequency

- Charge

- Speed

etc.

Derived unit of force

N

Base unit of force

kgms⁻²

Derived unit of energy/work done

J

Base unit of energy/work done

kgm²s⁻²

Derived unit of power

W

Base unit of power

kgm²s⁻³

Derived unit of frequency

Hz

Base unit of frequency

s⁻¹

Derived unit of charge

C

Base unit of charge

As

Derived unit of voltage

V

Base unit of voltage ⁻¹²³⁴⁵⁶⁷⁸⁹⁰

kgm²s⁻³A⁻¹

Derived unit of resistance

Ω / ohm

Base unit of resistance

kgm²s⁻³A⁻²

Giga (G) ⁻¹²³⁴⁵⁶⁷⁸⁹⁰

10⁹

Mega (M)

10⁶

Kilo (k)

10³

Deci (d)

10⁻¹

Centi (c) ⁻¹²³⁴⁵⁶⁷⁸⁹⁰

10⁻²

Milli (m)

10⁻³

Micro (μ)

10⁻⁶

Nano (n)

10⁻⁹