SELECT * FROM question_mgmt as q WHERE id=4214 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=8 AND subId=16 AND chapterId=191 and ex_no='5' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 9th science Work and Energy an electric heater is rated 1500 w how much energ

Question:

An electric heater is rated 1500 W. How much energy does it use in 10 hours?

Answer:

Power of the heater, P = 1500 W = 1.5 kW

Time taken, T = 10 h

Energy consumed by an electric heater can be obtained with the help of the expression,

Power = Energy consumed / time

Therefore, Energy consumed = Power × Time

= 1.5 × 10 = 15 kWh

Hence, the energy consumed by the heater in 10 h is 15 kWh.


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