Question

One kWh is equal to

• A. $3.6\times {10}^{6}J$
• B. $3.6\times {10}^{5}J$
• C. $3.6\times {10}^{4}J$
• D. $3.6\times {10}^{3}J$

Answer 1

Answer: (A)

$3.6\times {10}^{6}J$

Watt is defined as joule per second. Kilowatt is ${10}^3$joule per second and kwh is kilowatt hour ${10}^3\times 60\times 60$

So 1kwh=$3.6\times {10}^7$J.