Previous in Forum: High Volts in Neutral & Earth   Next in Forum: Neutral Path
Close

Comments Format:






Change Mode
Close

Subscribe to Discussion:

CR4 allows you to "subscribe" to a discussion
so that you can be notified of new comments to
the discussion via email.

Close

Rating Vote:







Add Vote
15 comments
Rate Comments: Nested
bacthiar_ahmed
Participant

Join Date: Mar 2014
Location: Bangladesh
Posts: 2

Problem with RLC Circuit

03/05/2014 8:47 AM

In the circuit shown below, find the value of the resistance R that is necessary to make the magnitude of V equal to 3 volts.

Can any one please help me to solve this out?
Register to Reply
Pathfinder Tags: RLC
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

"Almost" Good Answers:

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, vote them!
PWSlack
Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
Posts: 32175
Good Answers: 839
#1

Re: Problem with RLC Circuit

03/05/2014 8:56 AM

Oh, yes. The class tutor would be the first port of call, particularly as loads of variables remain undefined. Try there.

__________________
 "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
Register to Reply Score 1 for Good Answer
No more "Almost" Good Answers.
JohnDG
Guru
United Kingdom - Member - Not a New Member Hobbies - Musician - New Member Hobbies - Fishing - New Member

Join Date: May 2006
Location: Reading, Berkshire, UK. Going under cover.
Posts: 9684
Good Answers: 468
#2

Re: Problem with RLC Circuit

03/05/2014 9:28 AM

R can be anything you like, as you haven't defined V. So just call it 1 (remembering not to specify any units).

__________________
 "Love justice, you who rule the world" - Dante Alighieri
Register to Reply
bacthiar_ahmed
Participant

Join Date: Mar 2014
Location: Bangladesh
Posts: 2
#3
In reply to #2

Re: Problem with RLC Circuit

03/05/2014 9:46 AM

Magnitude of V is 3.

And given, e(t)=5sin(10^6t) volts

Then what happened?
Register to Reply
PeterT
Guru

Join Date: May 2010
Location: Liverpool, NY
Posts: 961
Good Answers: 131
#4
In reply to #3

Re: Problem with RLC Circuit

03/05/2014 9:53 AM

This should have been covered in class by your instructor (or did you skip that class?).

This should be explained in your textbook (or did you spend your textbook money elsewhere?).

This is not a homework site. Do your own work! You will never learn if someone spoonfeeds you the answers.

__________________
 To get the right answers, first you need to ask the right questions.
Register to Reply Score 1 for Good Answer
Go to Next "Almost" Good Answer
JohnDG
Guru
United Kingdom - Member - Not a New Member Hobbies - Musician - New Member Hobbies - Fishing - New Member

Join Date: May 2006
Location: Reading, Berkshire, UK. Going under cover.
Posts: 9684
Good Answers: 468
#8
In reply to #3

Re: Problem with RLC Circuit

03/05/2014 10:36 AM

Yes, yes you've already said how big it is. But you still haven't said what V is!!! Let's assume it's the voltage across R. Now let's change our minds, and assume it's the voltage across L. Now let's assume it's the voltage of my flashlight battery, just to make it a bit more tricky.

__________________
 "Love justice, you who rule the world" - Dante Alighieri
Register to Reply
Fredski
Guru

Join Date: Feb 2011
Posts: 7025
Good Answers: 207
#5

Re: Problem with RLC Circuit

03/05/2014 10:13 AM

please!
Register to Reply
Fredski
Guru

Join Date: Feb 2011
Posts: 7025
Good Answers: 207
#6

Re: Problem with RLC Circuit

03/05/2014 10:18 AM
Register to Reply
old salt
Guru
Safety - Hazmat - New Member Engineering Fields - Retired Engineers / Mentors - New Member Engineering Fields - Piping Design Engineering - New Member Hobbies - DIY Welding - New Member Fans of Old Computers - PDP 11 - New Member

Join Date: Feb 2007
Location: Stronger Than The Storm
Posts: 2394
Good Answers: 203
#7

Re: Problem with RLC Circuit

03/05/2014 10:29 AM

I did my academic homework years ago. You do your academic homework now!

How do you know that I won't dress up a wrong answer to make it look like the correct answer? If you choose it you sink! Do the work yourself and find out what is right and what is wrong. Besides all that, I charge an price you can't afford!

Good Luck, Old Salt

__________________
 Any day on the green side of the grass is a GREAT DAY!, --- me +++++++++. I believe creativity is an inherent part of everyone. --- Kermit T. Frog
Register to Reply
Kilowatt0
Guru

Join Date: Aug 2007
Location: Earth - I think.
Posts: 2143
Good Answers: 165
#9

Re: Problem with RLC Circuit

03/05/2014 11:51 AM

42

__________________
 TANSTAAFL (If you don't know what that means, Google it - yourself)
Register to Reply
Anonymous Poster #1
#15
In reply to #9

Re: Problem with RLC Circuit

03/06/2014 1:08 PM

42 is a good answer
Register to Reply
7anoter4
Guru

Join Date: Oct 2012
Location: 100 miles North from the World Center
Posts: 879
Good Answers: 42
#10

Re: Problem with RLC Circuit

03/05/2014 12:00 PM

The voltage V it is not the supply voltage e(t)=5*sin(10^6*t) but the voltage downstream from R as shown, I guess. If w=10^6 rad/sec then you can calculate the reactance and current in complex.

__________________
 Julius
Register to Reply
SolarEagle
Guru

Join Date: Mar 2007
Location: by the beach in Florida
Posts: 33392
Good Answers: 1817
#11

Re: Problem with RLC Circuit

03/05/2014 1:29 PM

Found this...



http://advancedeecircuits.blogspot.com/2010/02/analysis-of-rlc-circuits.html

__________________
 All living things seek to control their own destiny....this is the purpose of life
Register to Reply
jack of all trades
Guru
New Zealand - Member - Kiwi Popular Science - Weaponology - New Member Engineering Fields - Power Engineering - New Member Engineering Fields - Electrical Engineering - New Member

Join Date: Sep 2006
Location: Auckland, New Zealand
Posts: 8777
Good Answers: 376
#12

Re: Problem with RLC Circuit

03/05/2014 1:33 PM

Please read the forum rules and your textbook notes- homework questions are NOT allowed on CR4.

__________________
 jack of all trades
Register to Reply
IQ
Guru

Join Date: Feb 2013
Posts: 2004
Good Answers: 31
#13

Re: Problem with RLC Circuit

03/06/2014 4:59 AM

Can any one please help me to solve this out?

The correct answer for £5 is, yourself. You may also phone a friend or ask the tutor.
Register to Reply
Yusef1
Guru

Join Date: Jun 2006
Location: Ottawa Canada
Posts: 1975
Good Answers: 117
#14

Re: Problem with RLC Circuit

03/06/2014 7:44 AM

nice resonant circuit. Do your own homework.

'

__________________
 If it was easy anybody could do it.
Register to Reply
Register to Reply
Have a Different Question?
15 comments

"Almost" Good Answers:

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, vote them!
Copy to Clipboard

Users who posted comments:

7anoter4 (1); Anonymous Poster (1); bacthiar_ahmed (1); Fredski (2); IQ (1); jack of all trades (1); JohnDG (2); Kilowatt0 (1); old salt (1); PeterT (1); PWSlack (1); SolarEagle (1); Yusef1 (1)

Previous in Forum: High Volts in Neutral & Earth   Next in Forum: Neutral Path

Advertisement

Got Something to Say?
Ask a Question
Start a Discussion

Search this Forum
Electrical Engineering:
Go

CR4 Sections
Aerospace
BioMech & BioMed
Chemical & Material Science
Civil Engineering
Communications & Electronics
Education and Engineering Careers
Electrical Engineering
General Discussion
Instrumentation
Manufacturing
Mechanical Engineering
New Technologies & Research
Software & Programming
Sustainable Engineering
Transportation

Site Directories
Forum Directory
Blog Directory
User Group Directory
RSS Feeds

CR4 Rules of Conduct
CR4 FAQ
Site Glossary

Who's Online (108 right now)
Show Members
Advertisement