Question

how much energy is used for boiling water in a 2 kw kettle for 10 minutes? Calculate it in watt hour​

Answer 1

Given

• Power = 2 kw
• Time = 10 m

To Find

• Calculate In Watt Hour

We know That,

$\sf \: 60 \: Minutes = 1 \: Hour \\ \sf \: 10 \: Minutes = \frac{1}{6} \: hour$

• Power is defined as the time rate of change of energy . So ,

$\boxed{ \sf \: power = \dfrac{work \: done}{time \: taken} }$

$\sf \: 2kw = \dfrac{work \: done}{ \dfrac{1}{6}hour }$

$\sf \: work \: done \: = \: 2kw \times \dfrac{1}{6} hour$

$\sf \: work \: done \: = \: 0.33 \: kwh$

• $\underline{\boxed{\sf Work\ Done \ In\ KHW\ =\ 0.33\ Kwh}}$