| Author |
Message |
![[Post New]](/templates/default/images/icon_minipost_new.gif) 6 Dec 2007 18:05:48 IST
|
|
|
A long solenoid of radius a and number of turns per unit length n is enclosed by cylindrical shell of radius R, thickness d (d<<R) and length L. A variable current i=i0sin wt flows through the coil. If the resistivity of the material of cylindrical shell is p(rho), find the induced current in the shell.
|
~ANSHUMAN
I was born intellegent, education ruined me. |
|
|
|
6 Dec 2007 18:44:43 IST
|
|
|
mag field inside solenoid, B=uni B=unisinwt this field is changing in area of solenoid, A=  a^2 flux,  =BA = uni a^2sinwt emf induced, e=-d /dt = -uni a^2wcoswt area of shell = 2 Rd, length=L, resistivity=p then resistance, R=pl/a R=pL/2 Rd so induced current, I=e/R tell me if m corrct or not..
|
<TABLE CELLSPACING="1" CELLPADDING="1" BORDER="0">
<TR><TD>
<DIV ALIGN="right">Animated Letters</DIV></TD></TR></TABLE>
I am only one,
But still I am one.
I cannot do everything,
But still I can do something;
And because I cannot do everything
I will not refuse to do the something that I can do.
- Edward Everett Hale
|
this reply: 5 points
(with 1 
in 1 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
6 Dec 2007 20:41:21 IST
|
|
|
Nope. The answer is wrong.
The correct answer is
I = ( u0ni0 coswt)a^2(Ld) /2R?
Still a salute for ya
Experts pls help...
|
~ANSHUMAN
I was born intellegent, education ruined me. |
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
6 Dec 2007 21:11:57 IST
|
|
|
can u clarify watz the resistivity of the shell
its a '?' dere
|
<TABLE CELLSPACING="1" CELLPADDING="1" BORDER="0">
<TR><TD>
<DIV ALIGN="right">Animated Letters</DIV></TD></TR></TABLE>
I am only one,
But still I am one.
I cannot do everything,
But still I can do something;
And because I cannot do everything
I will not refuse to do the something that I can do.
- Edward Everett Hale
|
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
6 Dec 2007 21:20:26 IST
|
|
|
its rho
|
~ANSHUMAN
I was born intellegent, education ruined me. |
this reply: 2 points
(with 0
in 1 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
6 Dec 2007 21:33:58 IST
|
|
|
did u try it
what resistance r u gettin of the shell
|
<TABLE CELLSPACING="1" CELLPADDING="1" BORDER="0">
<TR><TD>
<DIV ALIGN="right">Animated Letters</DIV></TD></TR></TABLE>
I am only one,
But still I am one.
I cannot do everything,
But still I can do something;
And because I cannot do everything
I will not refuse to do the something that I can do.
- Edward Everett Hale
|
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
6 Dec 2007 23:30:29 IST
|
|
|
RHD in the shell the current will flow axially so area of cross section is L*d and lengt of path is 2*pi*R.
With this you will get right answer
|
Krishna Gopal Singh
B.Tech Chemical Engg
IIT Delhi 2002
Currently doing PhD from IIT Delhi |
this reply: 5 points
(with 1
in 1 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
|
|
Moderation Team
![[Up]](/templates/default/images/icon_up.gif "[Up]"){kind=icon}
2
