What is physical quantity? A physical quantity is a quantity that can be measured. A physical quantity is made up of numerical magnitude and a unit. Note, all physical quantity must have a numerical magnitude for CALCULATION and a unit to represent the SI unit which I will touch on it later on.
The unit of a physical quantity is a standard magnitude of the physical quantity which is used to compare other magnitudes of the same physical quantity.
Example, the length of a room is 10m so it is 10 times the length of a metre rule.
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