Find V_ab and |V_ab| and the phase of V_ab.

I thought about using Thevenin, but than I thought that the elements above AB are the same as under AB.

Or I can just say that [tex]V_AB=V_source-Z_R-( V_source-Z_C)[/tex]?
How should I approach this?

 

Do you know about complex impedance?

 

Do you know about complex impedance?

I know that

[plain][tex]V_source=V_in*e^{\omega t} Z_R=R and Z_C=\frac{1}{\omega c i}[/tex][/plain]

 

Here is the attempt

 

I know that

[plain][tex]V_source=V_in*e^{\omega t} Z_R=R and Z_C=\frac{1}{\omega c i}[/tex][/plain]

Okay, so if you were asked merely to find the voltage at Node A, could you do it?

If you were asked to merely find the voltage at Node B, could you do it?

If so, recognize that V_ab is, by definition, the voltage at Node A minus the voltage at Node B.

 

Okay, so if you were asked merely to find the voltage at Node A, could you do it?

If you were asked to merely find the voltage at Node B, could you do it?

If so, recognize that V_ab is, by definition, the voltage at Node A minus the voltage at Node B.

I have used voltage divider is it right?

 

Your image capture doesn't have enough contrast for my tired old eyes to read easily, but it appears you are starting out on the right path.

 

I have used voltage divider is it right?

Your approach using voltage divider is right but you need to review the formula to calculate voltage across each element of a voltage divider.