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 $ (kW \,h) = (10^3\, W) \times (3600 \,s) $
$ = 3.6 \times 10^{6}\,J = \frac{3.6 \times 10^{6}}{1.6 \times10^{-19}} eV \left(\because 1\,eV = 1.6 \times 10^{-19}\,J\right) $
$ = 2.25 \times 10^{25}\,eV $