Question

Calculate the energy consumed by 180 W electric iron in 30 minutes.​

Answer 1

GIVEN :–

• Power = 180 W = 0.18 KW

• Time = 30 min = 30/60 hr = 0.5 h

TO FIND :–

• Energy consumed = ?

SOLUTION :–

• We know that –

⇒ Energy = Power × Time

• Put the values –

⇒ Energy = (0.18)(0.5)

⇒ Energy = (0.18)(½)

⇒ Energy = (0.18)/2

⇒ Energy = 0.09 KWh

• Hence , The value of consumed Energy is 0.09 KWh.

Answer 2

$\huge\mathrm{Answer}$

Power = 180 W = 0.18 KW

Time = 30 mins = 30/60 = 0.5 h

Energy = Power × time

➡ Energy = 0.18 × 0.5

➡ Energy = 0.09 KWh

Ans) The energy consumed is 0.09 KWh

▬▬▬▬ $\huge\mathfrak{Notes ⭐}$ ▬▬▬▬

• Energy is the capacity to do work
• Power is the rate of doing work

➡ Energy should always be taken out in the unit KWh