Question

an electric heater is rated in 1500w. how much energy does it use in 5hrs and also convert into small unit​

Answer 1

Answer:

Time for which the heater is used

t=5 hours =5×3600 s =18000s

Energy consumed by the heater

E=P×t

where P is the power of the heater

∴ E=(1500) W ×18000 s

= 2,70,00,000

= 2.7×10⁷ joules

= 7.5kwh

[ ❖ 1kwh = 3.6 × 10⁶ J ]