Ac circuits

  • Thread starter jaejoon89
  • Start date
  • #1
195
0

Homework Statement


Connecting a 250 ohm resistor, 1.2 mH inductor, and 1.8 micro F capacitor in series across a 120 V, 60 Hz peak source, what will the voltage be for the resistor????


Homework Equations



1) I_peak = V_app peak / Z
2) V_R = I_peak * R

?

The Attempt at a Solution


I used equation 1) to get I_peak, and then equation 2) to get V_R which I calculated at 20.1 V. The answer's 14 V and I don't understand how the book is getting this
 
Last edited:

Answers and Replies

  • #2
alphysicist
Homework Helper
2,238
1
Hi jaejoon89,

Homework Statement


Connecting a 250 ohm resistor, 1.2 mH inductor, and 1.8 micro F capacitor in series across a 60 Hz, 120 V peak source, what will the voltage be for the resistor????


Homework Equations



1) I_peak = V_app peak / Z
2) V_R = I_peak * R

?

The Attempt at a Solution


I used equation 1) to get I_peak, and then equation 2) to get V_R which I calculated at 20.1 V. The answer's 14 V and I don't understand how the book is getting this
Were they asking for the peak voltage or the rms voltage across the resistor?
 
  • #3
195
0
Ah ha! I get it now, they want the rms since it's being read by a voltage meter. Thanks!
 

Related Threads on Ac circuits

  • Last Post
Replies
2
Views
831
  • Last Post
Replies
2
Views
1K
  • Last Post
Replies
1
Views
931
  • Last Post
Replies
1
Views
1K
  • Last Post
Replies
1
Views
1K
  • Last Post
Replies
2
Views
2K
  • Last Post
Replies
12
Views
1K
  • Last Post
Replies
2
Views
1K
  • Last Post
Replies
1
Views
1K
  • Last Post
Replies
5
Views
824
Top