The power of an electrical heater is 1500 watt How much energy it consumes in 10 hours

Tags: Class 9 , Physics , Work and Energy     Asked by Rajat Sinha    

• The relation between power and energy is

  Energy = Power x Time

  If, Power = 1500 Watt, Time = 10 Hours

  Then,

  Energy = 1500 Watt x 10 Hours = 15000 Watt-hr

  Answered on: 2016/07/11 by ExamFear    

  
  
  

• Power= 1500w=1500/1000=1.5kw Time=10 hours Energy=power×time 1.5×10 =15kWh.....

  Answered on: 2017/12/12 by Kiran    

  
  
  

Last updated at June 8, 2019 by

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Answer :

We know that, \( P \ = \ \frac{W}{T} \)

Where,

Power rating of the heater,(P) = 1500 W = 1.5 KW

T = 10 hrs, \(\space \)
Work done = Energy consumed by the heater

\(\therefore energy \ consumed \ = \ Power \ × \ Time \)

\(\Rightarrow 1.5 \ × \ 10 \ = \ 15 \ kWh \)

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

Text Solution

Answer : 15 kWh (Unit)

Solution : Energy consumed by an electric heater can be obtained with the help of the expression, <br> P = W/T <br> Where, <br> Power rating of the heating, `P= 1500 W = 1.5 W` <br> Time for which the heater has operated, `T = 10 h` <br> Work done = Energy consumed by the heater <br> Therefore, energy consumed = Power `xx` Time <br> `= 1.5 xx 10 = 15 kWh` <br> Hence, the energy consumed by the heater in 10 h is 15 kWh.

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