ac power analysis

[PG1995]

Hi

Please have a look on the attachment. Please help me with the query. Thank you.

Regards
PG

 

[MrAl]

Hi,

In short, the current through the resistor is never anything but real, so you'll never see a 3+5i current through a resistor.
The current through the resistor is always in phase with the voltage so you'll never see anything but 3 or 7 or 0.234 or whatever.
That's the ideal resistor.

 

[PG1995]

IrwinExt9.1

Thank you, MrAl.

Please have a look on the attachment. I first found the current through the capacitor, Ic. Then, I found the voltage across the capacitor, which is same as across the 4 ohm resistor, hence V_4Ω. Then, I used the formula: (1/2)Vm*Im*cos(θv-θi), Vm and Im are magnitudes of voltage and current. Please help me. Thanks.

Best wishes
PG

 

[PG1995]

I hope someone is not in process of replying. I have solved it. Thank you for giving it a look.

Regards
PG