In the study material units is defined as : units are the chosen standard of the measurement of the quantity, which has same nature as quantity. Explain the last line of this defination.

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Solution

$S a m e n a t u r e m e a n s t h e p h y s i c a l q u a n t i t i e s s h o u l d d e p e n d o n t h e s a m e f u n d a m e n t a l p h y s i c a l q u a n t i t i e s o n w h i c h t h e k n o w n u n i t o f t h e p h y s i c a l q u a n t i t y d e p e n d s . T h e f u n d a m e n t a l p h y s i c a l q u a n t i t i e s a r e m a s s, l e n g t h, t i m e, c u r r e n t, l u m i n o u s i n t e n s i t y . . . . e t c .$

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