CBSE Class 9 Answered
A microwave uses 450 KJ of electric energy in 5 minutes. Calculate its power rating.
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
Expert Answer
Electric energy consumed, E = 450 KJ
= 450 x 1000 J = 450000 J
Time taken, t = 5 minutes = 5 x 60 sec = 300 sec
Power, P = E/t
= 450000/300 = 1500 watts
Answered by | 04 Jun, 2014, 03:23: PM
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