Correct Answer - Option 4 : Currency
The correct answer is option 4) i.e. Currency
CONCEPT:
-
Physical quantity: A quantity that can be measured is called a physical quantity.
- It is expressed as the combination of a numerical value and a unit.
- A physical quantity can be expressed in terms of the dimensions of fundamental quantities.
-
The SI system has seven fundamental quantities i.e. time, length, mass, electric current, thermodynamic temperature, amount of substance, and luminous intensity.
The seven fundamental quantities along with their dimensions are as follows:
| Fundamental quantity |
Dimension |
| Time |
T |
| Mass |
M |
|
Electric current
|
A |
| Thermodynamic temperature |
K |
| Amount of substance |
mol |
| Luminous intensity |
cd |
| Length |
L
|
EXPLANATION:
-
Mass, distance, and thermodynamic temperature are fundamental quantities and have dimensions. So, they are physical quantities.
-
Currency is a unit to denote monetary amounts in different economic regions.
- Even though the currency is a measure of a single kind of quantity (money), it does not always have fixed conversion values.
- The conversion between physical quantities is always constant.
- Hence, the currency is not a physical quantity.
