Question

Which of the following units is not a fundamental unit?
A.Meter
B.Litre
C.Second
D.Kilogram

Answer 1

Hint:In any system of measurements we need some reference in order to exchange goods or any physical quantities by the comparisons. For that reason we have made some fixed reference is base unit to measure these quantities in and that reference or base units, so that this must be constant for all and in all over the world ,that will make the exchange process more convenient, Thus base unit or fundamental units are introduced which is given in detail in following columns

Complete step-by-step answer:
units. They don't depend on any other units, and they are used in the derivation of other units called derived units. The fundamental units of the International System of Units are:
Meter- It is used to measure length. Symbol m
Kilogram- It is used to measure mass Symbol Kg
Second- It is used to measure time. Symbol (s)
Kelvin- It is used to measure temperature. Symbol (K)
Mole- It is used to measure the amount of substance in matter. Symbol (mol)
Candela- It is used to measure the light intensity. Symbol (cd)
From the above units it is clear that the liter is not the fundamental unit.
Hence, the correct option is C.

Note:The fundamental units are used for measurement and we can measure the quantity directly using these units or derived units using these units to measure some quantity. For example we have to measure length, we will use meters for it directly but when we have to measure speed, acceleration then there is no direct unit for their measurements. We need to derive units for these quantities.