# Phase Angles, RC circuit

## Homework Statement

Find the phase angle between the input and output voltages in the following two circuits - in each case state whether the output leads or lags the input voltage. The second circuit is the same but the capacitor and the resistor are switched around.

## Homework Equations

I'm not really sure, this is why I'm here, I don't know how to use the information I have to get the answer.

## The Attempt at a Solution

So far I have:

Zr = 1000Ω∠0
Zc = 795.77Ω∠-90
Zt = 1278Ω ∠-38.51
It = 19.562 mA ∠ 38.51
Vr = 19.56v ∠38.51
Vc = 15.57v ∠-51.49

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gneill
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## Homework Statement

Find the phase angle between the input and output voltages in the following two circuits - in each case state whether the output leads or lags the input voltage. The second circuit is the same but the capacitor and the resistor are switched around.

## Homework Equations

I'm not really sure, this is why I'm here, I don't know how to use the information I have to get the answer.

## The Attempt at a Solution

So far I have:

Zr = 1000Ω∠0
Zc = 795.77Ω∠-90
Zt = 1278Ω ∠-38.51
It = 19.562 mA ∠ 38.51
Vr = 19.56v ∠38.51
Vc = 15.57v ∠-51.49
Hi nhenzie, Welcome to Physics Forums.

You've calculated a phase angle in association with Vr. How do you interpret that?

Thanks, I've been an avid browser of this forum for help with homework, it's been a great resource so far.

I guess I would say that Vr leads the input voltage by 38.51 degrees, and in the 2nd circuit the output voltage lags the input voltage by 51.48...I'm thinking I just answered the question myself....thanks for the guidance, I should probably think things over a bit more before posting....