Question

Which one has not the same unit as other?

• A. watt sec
• B. kilowatt hr
• C. e V
• D. J sec

Answer 1

The correct option is D J sec

Here,

$watt-sec=\frac{joule}{sec}\times sec=joule=unitofenergy$

$kilowatt-hr={10}^3\times \frac{joule}{sec}\times 3600sec=joule=unitofenergy$

$eV=unitofenergy$

But

$Joule-sec=unitofenergy\times sec$

Option (D) is correct option.