Question

Define 1KWh. Give the relation between 1kwh and Joule.

Answer 1

1 Kwh is the amount of electrical energy consumed when an electrical appliance having a power rating of Kilowatt is used for 1 hour. 

1 Kwh = 3.6 X 10^6 J

Answer 2

The relation between 1 kWh and Joule is $3.6\times10^6J$.

Explanation:

The power is defined as

$P=\frac{E}{t}$

Here, P is the power and its unit is W and E is the energy and its unit is J and t is the time its unit is s.

1 kWh is defined as the 1000 J energy is used in 1 hour.

We have to calculate the value of 1 kWh in joule.

1 kW = 1000 W and 1 h = 60 x 60 s = 3600 s

so, 1 kWh = 1000 W x 3600 s

               $=3.6\times10^6J$           (as E  = P x t)

Thus, the relation between 1 kWh and Joule is $=3.6\times10^6J$.

#Learn More: power energy relation.

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