What is the Frequency of an Alternating Current with a Sin Curve?

Click For Summary

Homework Help Overview

The discussion revolves around determining the frequency of an alternating current represented by the equation U(T)=15cos(314t). The subject area pertains to electrical engineering concepts, specifically alternating current and wave properties.

Discussion Character

  • Exploratory, Mathematical reasoning

Approaches and Questions Raised

  • Participants explore the relationship between the angular frequency given in the equation and the frequency of the alternating current. There is an attempt to clarify the calculation involving the conversion from angular frequency to frequency.

Discussion Status

Some participants have provided guidance on the correct approach to calculating frequency, suggesting the need to divide the angular frequency by 2π. There is an acknowledgment of a calculation error by one participant, indicating a productive exchange of ideas.

Contextual Notes

One participant expresses uncertainty about their understanding of the problem, indicating they are new to this type of question. There is also mention of potential calculation errors affecting the discussion.

JBemp
Messages
22
Reaction score
0

Homework Statement


what is the frequency F for the alterating current
U(T)=15cos(314t) A


Homework Equations


Am really new at this kind of problem but i think 314 is how many times the current rotates or fluxuates in 1 period so the F has to be the distance between waves?



The Attempt at a Solution



15cos(314T)

314/2pi i get 493.23 but i know that's wrong
 
Physics news on Phys.org
Are you sure 314/(2pi) is 493.23? Check with your calculator properly :wink:
 
Last edited:
[tex]U\propto cos(\omega t) ~~~~ \omega = 2\pi \nu[/tex]

So you should divide 314 with 2pi, not divide 314 with 2 and then multiply with pi.
 
ok i see what i did worng forgot the darn ( ) on the calc. man these ( ) always screw me.

thank you both
 

Similar threads

Replies
1
Views
2K
  • · Replies 1 ·
Replies
1
Views
5K
  • · Replies 6 ·
Replies
6
Views
5K
  • · Replies 8 ·
Replies
8
Views
2K
Replies
2
Views
3K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 1 ·
Replies
1
Views
1K
  • · Replies 10 ·
Replies
10
Views
6K
  • · Replies 3 ·
Replies
3
Views
2K