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Q UE S T I O N S1. What determines the rate at which energy is delivered by a current?2. An electric motor takes 5 A from a 220 V line. Determine the power ofthe motor and the energy consumed in 2 h.

Answer»

1)Solution:Therateof consumption of electricenergyin an electric appliance is called electric power. Hence, therate at which energy is delivered by a currentis the power of the appliance.

2)p= VxI=220x5=1100wSo ,in 2hour=2x1100=2200w

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