Question

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Question :-
Find the energy in Kw h consumed in 5 hours by a machine of power 200w.

Answer it fast and correctly with proper steps.
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Answer 1

Dear Student,

★Answer:

______________________  

☛ Given :

Given Parameters  

⇒Power rating of the device (P) = 200 W = 0.20 kW  

⇒Time for which the device runs (T) = 5 h

______________________

★Explanation :

Energy consumed by an electric device can be obtained with the help of the expression for power,

☛ P = W/T

➤ Work done = Energy consumed by the device  

∴ Energy consumed = Power × Time  

⇒Energy consumed = 0.20 × 5  

⇒ Energy consumed = 1 kWh

➼ Hence, the energy consumed by device  in 5 h will be

1 kwH  

Answer 2

$\sf\large{\underline{Given:-}}$

• Power = 200w
• Time = 5 hrs

$\sf\large{\underline{To~ Find:-}}$

• Energy Consumed

$\sf\large{\underline{Solution:-}}$

$\star$ We need answer in kWh, Change power into kwh.

• $\sf{Power = 200w = \cancel\frac{200}{1000} = 0.2kwh}$

We know,

$\bigstar { \underline{\boxed{\sf{energy \: consumed \: = power \times time}}}}$

$\longrightarrow \sf energy \: consumed= 0.2 \times 5$

$\longrightarrow \sf energy \: consumed = 1kwh$

Hence, the work done or energy consumed by a machine in 5 hrs is 1kwh.