Which one of the following is the value of 1 KWh of energy converted into joules?

Question

Question

Answer 1

Concept:

Joule is a SI unit of energy or work done which is represented by J

Watt is a S.I unit of Power and it is represented as W

\(power\left( W \right) = \frac{{Work\;done\left( J \right)}}{{time\left( {sec} \right)}}\)

Work done (J) = power (W) × time (sec)

1 joule = 1 watt. Sec

Calculation:

Since 1 KW = 1000 W

And 1 hour = 60 min x 60 sec

\(\therefore 1\;kWh = 1 \times {10^3} \times 60 \times 60 = 3600 \times {10^3}\;J\)

Thus \(1\;kWh = 3.6\; \times {10^6}\;J\)