Question

Which of these units of energy is the largest?

• A. $1Calorie$
• B. $1Joule$
• C. $1Erg$
• D. $1Kilowatt-hour$

Answer 1

The correct option is D $1Kilowatt-hour$

Energy is the ability to do work.

$1calorie=4.186J$

$1erg=1\times {10}^{-7}J$

$1kWh=3.6\times {10}^6$ $J$

$1kilowatt-hour$ is the largest unit of energy.