Question

State whether the given statement is true or false.
The standard quantity used for comparison is called a fundamental quantity.

Answer 1

Hint: To represent an amount of substance like a certain quantity of rice, wheat, or anything we need one magnitude and one more unit. This unit must be a standard one. So, we can use those units anywhere and anytime.

Complete step by step solution:
A standard quantity used for comparison is called fundamental units.
To compare any of the physical quantities we need a specific or well-defined parameter. And this parameter should be the same all over the world and should not change with time or temperature. Then only it is called standard units.
Thus, the standard quantity used for comparison is called fundamental units.

Additional information:
Physical quantities are those which can be measured and expressed in terms of numerical value.
Physical quantities can be classified into two types.
1) Fundamental physical quantity
2) Derived physical quantity
The physical quantities which are independent of any other quantities are called fundamental physical quantities.
Example: mass, length, time, thermodynamic temperature.
The physical quantities which can be derived from fundamental quantities are called derived physical quantities.
Example: area, volume, speed, acceleration.
SI unit is defined as the standard reference of the physical quantity which is used to compare given physical quantity.
There are three systems of units. They are:
(i) F.P.S ( FOOT-POUND-SECOND) SYSTEM
(ii) C.G.S (CENTIMETRE-GRAM- SECOND) SYSTEM
(iii) M.K.S ( METRE-KILOGRAM-SECOND) SYSTEM
Few requirements or features of SI units.
(i) It should be of suitable size: that is neither too large nor too small when compared to the quantity to be measured.
(ii) It should be well defined.
(iii) It should be independent of time, place, and other physical conditions like temperature, pressure.
(iv) It should be easily reproducible

From these observations, we can say a given statement is false.

Note:
The international system of units is abbreviated as an SI unit. It is the international standard used for the representation of units. It is accepted all over the world.