An electric heating element is connected to a 110 V circuit and a current of 3.2 A is flowing through the element. How much energy is used up during a period of 5 hours by the element?

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Answer 1 · 2017-04-23T08:19:42

The energy is #=6336kJ#

The power is

#P=UI#

The voltage is #U=110V#

The current is #I=3.2A#

The power is

#P=110*3.2=352W#

The electrical energy is

#E=Pt#

The time is

#t=5*60*60=18000s#

So,

The energy is

#E=352*18000=6336000J=6336kJ#