Question

How many joules are there in 1 kilowatt hour ??

Answer 1

Hey !

1 kWh = 1 kW * 1 hour

1 kW = 1000 W
1 hour = 3600 sec

1 kWh = 1000 W * 3600 sec
           = 3600000 W/s
           = 3.6 × 10⁶ W/s
   

1 W/s = 1 Joule(J)

hence,

1 kWh = 3.6× 10⁶ J

Answer 2

Answer:

$3.6 \times 10^{6} \mathrm{~J}$  joules are there in 1-kilowatt hour.

Step-by-step explanation:

• The kilowatt-hour (symbolized kWh) exists as a unit of energy equal to one kilowatt (1 kW) of power expended for one hour (1 h) of time. The kilowatt-hour exists not as a standard unit in any standard system, but it is commonly utilized in electrical applications.
• joule, a unit of work or energy in the International System of Units (SI); it exists similar to the work done by a force of one newton acting via one meter.

As

$1 \mathrm{~kW}=1000 \mathrm{~W} ; 1 \mathrm{hr}=3600 \mathrm{~s}$

$1 \mathrm{kWh}=1000 \mathrm{Wh}$

$=3600000=3.6 \times 10^{6} \mathrm{Ws}$

We get,

$=3.6 \times 10^{6} \mathrm{~J}$

Hence $3.6 \times 10^{6} \mathrm{~J}$  joules are there in 1-kilowatt hour.

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