Question

find the energy in kwh consumed in 10 hours by a machine of power 500w

Answer 1

E =pt
Power =500w
Power =1/2kw
T=10hr
E=pt
E=1/2×10
E=5kwh

Answer 2

Hey friend, Harish here.

Here is your answer:

Given that,

Time = 10 hours.

Power = 500.

To  find,  

Energy in Kwh.

Solution,

We know that,

$Power = \frac{Energy}{Time}$

⇒ $500 = \frac{Energy}{10}$

⇒ $Energy = 500\times 10 = 5000\ wh.$


We know that, 

[tex] 1\ Kwh = 1000\ wh.[/tex]

$\frac{1}{1000} kwh = 1 wh.$

So,

$5000 wh = \frac{5000}{1000}= 5Kwh.$

Therefore energy is 5 Kwh.
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Hope my answer is helpful to you.