Question

If fundamental unit of mass , length and time are each doubled , what happen to the unit of energy

• A. halved
• B. triple
• C. double
• D. become 4 time

Answer 1

The correct option is C double

$\begin{array}{c}\left[E\right]=\left[M{L}^2{T}^{-2}\right]\\ \left[E^{{}^{\prime }}\right]=\left[\frac{2M4L^2{T}^{-2}}{4}\right]\\ =2\left[E\right]\end{array}$

Hence $c$ is the correct answer.