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Q.

Suppose u1 and u2 are the units selected of a physical quantity in two systems of measurement and n1 and n2 are their numerical values, then which of the following is correct?

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a

n1u1=n2u2

b

n1u1+n2u2=0

c

n1n2=u1u2

d

n1+u1=n2+u2

answer is A.

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Detailed Solution

Physical quantity

(p) = Numerical value (n) × Unit(u)

If physical quantity remains constant then n∝1u

∴n1u1=n2u2

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