Q. The SI unit of length is the metre. Suppose we adopt a new unit of length which equal $x$ metre. The area of 1 $m^{2}$ expressed in terms of the new unit has a magnitude
A) $x$
B) $x^{2}$
C) $x^{- 1}$
D) $x^{- 2}$
Explanation
$n(xm)^{2} = 1m^{2}$ or $n = \frac{1}{x^{2}}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.