Answer :- A measuring system is based on few fundamental units
e.g. Lenght, Mass, Time , Temperature etc . All the physical
quantities is being expressed in terms of these fundamental units .
(a) F. P. S. System :- Here, the lenght is measured in yard, mass, weight or force in pound, time in seconds and temperature is degree forenheit.
(b) Metric system :- Here, the lenght is measured in meter mass in kilogram force in kilogram force, time in second and temperature in degree centigrade .
(c) S.I. System :- this system is extension and refinement of the meter system . Here, the lenght is expressed in meter, mass in kg, force in newton, time in second etc. It is based on decimal arithmetic.
(d) C.G.S System :- In this system, the unit of lenght of lenght, mass and time are centimeter, gram and second.
(e) M.K.S System :- In this system, the unit of lenght, mass and time are meter, Kilogram and Second.
This system is extension and refinement of the meter system. .
Here, the lenght is expressed in metre, mass in kg, force in newton,
time in second etc. It is based on decimal arithmetic.
S. No. physical quantity Unit Symbol
- Lenght Meter M
- Mass Kilogram Kg
- Time Second S
- Temperature Kelvin K
- electric current Ampere A
- luminous intensity Candela Cd
- Quantity of substance Mole Mole

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