Question
What do you understand by the terms
1. unit
2. magnitude, as applied to a physical quantity?
1. unit
2. magnitude, as applied to a physical quantity?
✓
Answer
(i) Unit : Unit "is a standard quantity of the same kind with which a physical quantity is compared for measuring it. " In order to measure a physical quantity, a standard is needed (which is acceptable internationally). The standard should be some convenient, definite and easily reproducible quantity of the same kind in terms of which the physical quantity as a whole is expressed. This standard is called a unit
(ii) Magnitude of a physical quantity : The number of times a standard quantity is present in a given physical quantity is called magnitude of physical quantity.
Physical quantity $=$ Magnitude $\times$ Unit
(ii) Magnitude of a physical quantity : The number of times a standard quantity is present in a given physical quantity is called magnitude of physical quantity.
Physical quantity $=$ Magnitude $\times$ Unit
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