Question

List of physical quantities and their si units in physics

Answer 1

Sym. Unit Definition

length l metre m The length of the path travelled by light in 1/299 792 458 of a second

mass m kilogram kg The mass of the International Prototype Kilogram

time t second s The duration of 9 192 631 770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium 133 atom, at rest, at a temperature of 0 K

electric

current I ampere A The constant current which, if maintained in two straight parallel conductors of infinite length, of negligible circular cross-section, and placed one metre apart in a vacuum, would produce between these conductors a force equal to 2 x 10-7 newton per metre of length

thermodynamic

temperature T kelvin K The fraction 1/273.16 of the thermodynamic temperature of the triple point of water

amount

of

substance n mole mol The amount of substance of a system which contains as many elementary entities as there are atoms in 0.012 kilogram of carbon 12 (elementary entities, which must be specified, may be atoms, molecules, ions, electrons, other particles or specified groups of such particles)

luminous

intensity Iv candela cd The luminous intensity, in a given direction, of a source that emits monochromatic radiation of frequency 540 × 1012 hertz and that has a radiant intensity in that direction of 1/683 watts per steridian

Answer 2

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List of Physical quantities and SI units :

• Mass ( Kilogram)
• Time ( Second)
• Length (metre)
• electric current (ampere)
• Thermodynamic temperature( kelvin)
• Luminious intensity ( candela)
• Electric current (ampere)
• Amount of substance ( mol)