Question

$1$ $kWh$ equals:

• A. $36\times {10}^2$ J
• B. $36\times {10}^4$ J
• C. $3.6\times {10}^6$ J
• D. none of these

Answer 1

The correct option is C $3.6\times {10}^6$ J

$1kW=1000watt=1000joule/s$
Hence $1kWh$ .i.e 1 kilo Watt hour will be,
$1kWh=1000\times 60\times 60joule$
$1kWh=3600000joules=3.6\times {10}^{6}joule$