Question

If $u_1$ and $u_2$ are the units selected in two systems of measurement and $n_1$ and $n_2$ are their numerical values respectively, then for constant physical quantity

• A. $n_1{u}_1=n_2{u}_2$
• B. $n_1{u}_1+n_2{u}_2=0$
• C. $n_1{n}_2=u_1{u}_2$
• D. $n_1+u_1=n_2+u_2$

Answer 1

The correct option is A $n_1{u}_1=n_2{u}_2$

As we know that, for constant physical quantity
$\text{Numerical value}\propto \frac{1}{\text{Unit}}$
$\therefore$ Here, the relation would be
$n_1{u}_1=n_2{u}_2$