Question

Convert 1 kWh to SI unit of energy.

• A. $3.6\times {10}^{6}J$
• B. $3.6\times {10}^{8}J$
• C. $1.8\times {10}^{6}J$
• D. $1.8\times {10}^{8}J$

Answer 1

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

We know that,

$1watt=1joule/sec$ and $1kW=1000watt$

Therefore,

$1kWh$ $=1000watt\times 1hour=1000joule/sec\times 3600sec$ $=3.6\times {10}^6$ $J$