एक विद्युत हीटर (ऊष्मक) की घोषित शक्ति 1500 w है। 10 घंटे में यह कितनी ऊर्जा उपयोग करेगा?
Solution Energy consumed by an electric heater can be obtained with the help of the expression, P = W/T Where, Power rating of the heating, P=1500W=1.5W Time for which the heater has operated, T=10h Work done = Energy consumed by the heater Therefore, energy consumed = Power × Time =1.5×10=15kWh Hence, the energy consumed by the heater in 10 h is 15 kWh.
