Correct Answer - Option 1 : n
1u
1 = n
2u
2
CONCEPT:
Physical quantity:
- A quantity that can be measured and by which various physical happenings can be explained and expressed in the form of laws is called a physical quantity.
Ex: length, mass, time, etc.
EXPLANATION:
- A physical quantity is represented completely by its magnitude and unit.
⇒ Physical quantity = magnitude×unit = n×u
If n1 and n2 are the magnitudes of a physical quantity in two different systems of units.
Then n1 × u1 = n2 × u2
Where u1 and u2 are the units in two different systems of units.
⇒ n1u1 = n2u2
- Hence, option 1 is correct.