Question

NTSE physics question A 1500 w electric geyser used every day for 2 hrs. Calculate the energy consumed ? (a) 90 kwh (b) 30 kwh (c) 750 kwh (d) None of these Please explain! Thanks

Answer 1

the answer is  (d) none of these.
Explanation: power=1500W(1500/1000=1.5 kWh)
                     time=2 hours
                   ∴energy,
                                power=energy/time taken
                                 1.5=energy/2
                                 1.5* 2= energy
                                 3 kWh=energy. 
                    
                 i hope that this will help u.

Answer 2

Answer:

(D)-None of the above

Explanation:

firstly,

        1500W = 1500/1000KWh

                     =>1.5KWh

        Time taken = 2hrs

        Now power = energy consumed/time taken

        therefore, 1.5 = energy consumed/2hrs

        so, energy consumed = 1.5 * 2              

                                             =>3KWh

         So, the energy consumed = 3KWh