Question

In Exercises 3 and 4, what is the net power absorbed by each circuit over a complete cycle. Explain your answer.

Answer 1

In Exercise 3 Average power `P = V_("rms")`
`I_("rms").cos phi`
As we know that the phase difference between current and voltage in case of inductor is `90^(@)`.
`P = V_("rms").I_("rms").cos 90^(@)=0`
In Exercise 4 Average power
`P = V_("rms").I_("rms").cos phi`
We know that the phase difference between current and voltage in case of capacitor is `90^(@)`
`P=V_("rms").I_("rms").cos90^(@)=0`