Question

$1$ kilowatt hour $(kWh)$ is equal to

• A. $2.25\times 10^{22}eV$
• B. $2.25\times 10^{23}eV$
• C. $2.25\times 10^{25}eV$
• D. $2.25\times 10^{27}eV$

Answer 1

Answer: (C)

$1$ kilowatt hour $(kWh)=(10^{3}W)\times (3600s)$
$=3.6\times 10^{6}J=\frac{3.6\times 10^6}{1.6\times 10^{-19}}eV\left(\because 1eV=1.6\times 10^{-19}J\right)$
$=2.25\times 10^{25}eV$