Question

A ratio set of 60W runs for 50hrs .How much electrical energy consumed.
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Answer 1

Explanation:

We want to calculated the electrical energy in kilowatt-hours, so first we should convert the power of 60 watts into kilowatts by dividing it by 1000. That is : <br> Power, P =60 watts <br>

60/1000

kilowatts <br> = 0.06 kW <br> And, Time, t = 50 h <br> Now, putting P = 0.06 kW and t = 50 h in formula: <br>

Power = Energy Consumed/Time Taken

<br> We get : 0.06kW = Energy Consumed/50h

<br> So, Energy consumed = 0.06kW×50h

<br> = 3 kWh <br> Thus, the electrical energy consumed is 3 kWh or 3 units.

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Answer 2

Question:

A ratio set of 60W runs for 50hrs .How many 'units' of electrical energy is used?

Answer:

⇒$w=3000watt$

⇒$w=3kilowatt$

⇒$w=3 unit$

Explanation:

We know that Formula: (electrical energy =Power *Time)

Given

⇒$Power=60 watts$

⇒$Time=50hours$

We can apply to the formula:

⇒electrical energy =Power *Time

⇒Electrical energy =$60w*50hours$

⇒Electrical energy=3000watts hours

Now we have convert into kilowatt that is

we know that $1 kilowatt=1000kilowatt$

⇒Here we can convert into 3000watts into Kilowatts

⇒$\frac{3000}{1000}$

⇒$\frac{3}{1}$

Hence your kilowatt will be 3kilowatt

⇒$w=3kwh$

Here they have said to convert again into unit

⇒ I unit = 1 Kilowatt hour

⇒Watt = 3 unit

Hence your final answer is 3 unit.