Hello every9one i'm stuck on finding the first part:(adsbygoogle = window.adsbygoogle || []).push({});

A series RLC circuit is driven by an alternating source at a frequency of 380 Hz and an emf amplitude of 90.0 V. The resistance is 20.0 , the capacitance is 12.1 µF, and the inductance is 24.2 mH.

What is the rms potential difference across the resistor?

my first answer was wrong,

Am i t hinking this right?

Vab = Vmax sin(wt)

Vab = iR

i = 90/20 = 4.5, but thisn't isn't i max is it?

do i have to take i/sqrt(2) to get i max?

then with i max can i find the rms across the ressitor?

I found a formula that syas:

Vab = Vmax*sin(wt) but time isn't given at all, netiehr isVmax!

**Physics Forums | Science Articles, Homework Help, Discussion**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: What is the rms potential difference across the resistor?

**Physics Forums | Science Articles, Homework Help, Discussion**