Question

an electric heater is rated 1500 w. how much energy does it use in 5 hours
answer in photo solution please
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Answer 1

Energy consumed by an electric heater can be obtained with the help of the expression P= W/T.

Energy consumed by an electric heater can be obtained with the help of the expression P= W/T.Where,

Energy consumed by an electric heater can be obtained with the help of the expression P= W/T.Where,Power rating of the heater (P) = 1500

Energy consumed by an electric heater can be obtained with the help of the expression P= W/T.Where,Power rating of the heater (P) = 1500W = 1.5 kW = 1500 W

Energy consumed by an electric heater can be obtained with the help of the expression P= W/T.Where,Power rating of the heater (P) = 1500W = 1.5 kW = 1500 WTime for which the heater has operated (T) = 5 h

hWork done = Energy consumed by the heater

hWork done = Energy consumed by the heater∴ Energy consumed = Power × Time

hWork done = Energy consumed by the heater∴ Energy consumed = Power × TimeEnergy consumed = 1500 × 5

Energy consumed = 7500 W

WHence, the energy consumed by the heater in 10 h is 7500W

Answer 2

Given :- Power = 1500 w.

∴ Time taken = 5 hours.

Solutions:-

$Power= \frac{energy \: \: consumed}{time \: \: taken}$

Energy consumed = power x time taken.

= 1500 x 5

= 7,500 w.

∴ Answer = 7,500 w energy will use in 5 hours.