
Before posting anything, please review the Physics Forums Global Guidelines.
Again, for some odd reason, people...

Apr2211 05:26 AM
ZapperZ

1 
46,973 
Why are y and y' treated as independent variables, while they are not?
Another slightly related question:
if ' =...

May614 07:04 AM
UltrafastPED

2 
190 
I was reading the Roger Penrose book Emperor's New Mind and he was explaining the determinism in Newtonian mechanics. ...

May2713 12:53 PM
lightarrow

3 
516 
This paper, written by a University of Pittsburgh professor, John Norton, describes a simple situation in which...

Jan2411 01:39 PM
LuisVela

5 
2,609 
If a light travels from A to B and there's a plane of glass in between the two points, will the total time it takes to...

Aug411 01:08 PM
y33t

3 
1,102 
Could anyone please write the derivation (or forward me to the source of derivation) of the formula related these two...

May2014 06:49 PM
UltrafastPED

3 
245 
Can someone explain in terms of electric fields how the index of refraction squared = the dielectric constant of the...

May908 05:26 AM
Hootenanny

1 
11,812 
Hi,
Is it possible that the medium of lesser density has larger index of refraction? If yes, please give me some...

Aug2113 07:52 AM
Abhilash H N

1 
414 
Assume we have a plane of oscillating charges described by x=xoei(omega)t.
The total field is given by E=...

May1210 03:27 AM
matonski

4 
991 
Is the index of refraction for LCP/RCP light any different from that for linearly polarized light?

Oct411 10:51 AM
DrDu

2 
1,716 
I'm going through the Light & Optics chapter of Kaplan MCAT prep material & am having a hard time conceptually...

Apr2412 08:32 AM
grindfreak

1 
5,981 
Hi everybody
It's easy (and well known) to calculate the charge distribution of a condutor in the presence of a point...

Jun2011 03:05 PM
gabrielbhl

3 
1,097 
In chapter 10 section 3 volume 2 of the Feynman lectures on physics, there is a passage that I can't force myself to...

Aug2306 11:51 AM
Meir Achuz

1 
5,697 
one conducting plate is at origin of xy plane. and +q is at distance of d from y axis in the direction of z axis. then...

Sep909 08:54 AM
clem

2 
1,627 
Say you had a rectangular piece of conductor perfectly balanced on a central pivot point. Around it, you put...

Nov2812 11:04 PM
Simon Bridge

1 
790 
There's no electric field inside a conductor, a classic observation of electrostatics. Any field that "should" exist...

Jan211 12:07 PM
yungman

2 
3,167 
All
I understand clearly that if a metal sphere is charged then the charges must reside on the surface because that...

Mar413 08:50 PM
Meir Achuz

3 
740 
There is one point im unclear upon in terms of indued charges.
If a charge is induced by another charge, will the...

Aug2911 09:14 AM
chrisbaird

4 
1,115 
Can anyone point me to a good site that explains current induction, specifically when a coil is placed around an...

Jun2410 03:40 PM
K^2

1 
562 
These are 2 straight wires parallel for 3 inches. Specifically a 6AWG and 12AWG separated approximately 2 inches. A...

Oct913 05:42 PM
PsiStar

10 
786 
Hi,
Question:
we have a magnetization M_x that varying as M_x(t)=M_x e^{t}.Threre is a coil on the x axe. The...

Apr1112 03:50 AM
DrDu

26 
2,094 
I've just got confused about how the induced current in a metallic ring is calculated.
Consider a metallic ring...

Dec1412 06:00 PM
Enthalpy

2 
527 
Hi there,
When you have a loop of wire and you move a bar magnet through it, you induce a current in the wire.
...

Jan2211 03:36 PM
tinytim

1 
1,018 
Hi all, I am having a hard time understanding the following scenario (I'm quoting from page 305 of the "Electricity &...

Feb2308 07:24 PM
david20

5 
10,792 
Hi,
I'm a bit confused by induced drag on an aerofoil and hoping somebody can clear it up for me.
I understand...

Mar913 02:39 PM
rcgldr

3 
620 
Imagine a solenoid with n turns per length. Now, for an instant, in which everything looks static, the magnetic field...

May3007 04:51 PM
Meir Achuz

7 
2,699 
If I have a B field in between two current carrying sheets and I approach this moving at a constant speed. And I have...

Apr2911 03:48 PM
cragar

4 
634 
I am a high school student, so forgive me if my question appears stupid.
Consider a uniform magnetic field normal...

Apr510 02:40 AM
Phrak

42 
5,238 
Can electric field be induced at a point near a time varying uniform magnetic field? "Near" means not the in the place...

Dec2012 09:35 AM
dev70

14 
1,730 
I've just seen induced electric field concepts. Could anyone provide a link, which explains it?
I had some rather...

Sep2409 04:19 PM
Bob S

1 
2,090 
suppose there is a region S through which the magnetic field changes with time then is the electric field induced...

Nov1707 12:21 PM
Crosson

7 
1,586 
Hi all,
I am looking into induced electric fields by changing B fields inside layers of dielectric. For example, if...

Jul814 05:13 AM
vanhees71

10 
1,194 
well iwas going through the standard example that is there is a uniform magnetic field in aregion going into the palne...

Aug2707 07:09 PM
Paulanddiw

59 
7,517 
A circular loop of wire has a changing magnetic field running through it...however, the magnetic field is not touching...

May1808 01:53 AM
Dozent100

25 
3,620 
Suppose now i have connected a solenoid with a dc power supply of 10V
When i increase the voltage to 20V the magnetic...

Dec1810 03:05 AM
whitegheghe10

0 
572 
I know the equation for emf: dflux/dt= dB/dt*A . In my case everything is constant accept the magnetic field and I...

Apr2411 07:14 PM
laxmaster08

28 
2,430 
Faraday's law says that an induced voltage across a conductor is directly proportional to the rate of change of...

Jan3111 11:50 AM
cabraham

2 
3,887 
ok, if i have a rectangular loop parallel to the screen and in a uniform constant magnetic field pointing...

Mar2510 05:11 AM
quietrain

7 
1,780 
Hello,
While considering Faraday's Law of Induction, I tried to think of a situation which would expose some...

Jan2212 03:26 PM
Philip Wood

8 
1,971 
Hi everyone,
This question is bothering me for days and would hope to receive some help in this forum. This...

Jul2811 08:30 AM
Philip Wood

21 
5,938 
I am having some trouble understanding why and how the emf changes when a bar magnet is dropped into a solenoid.
As...

Sep2612 05:06 AM
Philip Wood

5 
1,443 