Which one has consumed more energy when they worked continuously for 1 hour
a) An electric iron 0f 1000W
b) An electric lamp of 60W
c) A washing machine of 10400W
d) An electric hair dryer of 1500W
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Answers
Given
Power of Electric iron = 1000 W = 1 kW
Power of lamp = 60 W = 0.06 kW
Power of a washing machine = 10400 W = 10.4 kW
Power of a electric hair dryer = 1500 W = 1.5 kW
Time = 1 hour
To Find
Appliances that consumes the most energy Consumed
Solution
● Electrical Energy consumed is equal to the product of the power and the time
✭ Energy consumed by Iron :
→ E = Power × time
→ E = 1 × 1
→ E(ᵢᵣₒₙ) = 1 kWh
✭ Energy consumed by lamp :
→ E = Power × time
→ E = 0.06 × 1
→ E(ₗₐₘₚ) = 0.06 kWh
✭ Energy consumed by washing machine :
→ E = Power × time
→ E = 10.4 × 1
→ E(ₘₐ꜀ₕᵢₙₑ) = 10.4 kWh
✭ Energy consumed by hair dryer :
→ E = Power × time
→ E = 1.5 × 1
→ E(dᵣᵧₑᵣ) = 1.5 kWh
∴ The washing machine consumes the most energy
Explanation:
I think c is correct answer
hope it helps you.....