Capacitor and Capacitance
We know that the main use of capacitor is to store charge in the form of electric field,and we want it to store as much charge as possible without leaking and we try to decrease the potential...
View Articlecapacitor and dielectric
Why do the capacitance increase with increase in dielectric constant(K) of the medium between the capacitor?
View ArticleSound Doppler shift asymmetry confusion
I have come to learn that the Doppler shift equation is asymmetric. That is, the Doppler shift is not the same when source is moving towards the observer or when the observer is moving towards the...
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Is the Biot-Savart Law reversible?
Please find the attachment and comment about equation (2). Attached Files The Biot-Savart Law.docx (14.6 KB)
View Articleelectrons in metal..
I just wanted to clear one thing... in metals what type of potential the electrons are subjected to..?? Is it constant , sinusoidal , square or non-periodic..?? plzz explain a bit in accordance with...
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Divergence angle of light exiting a nano-etched single mode fiber
I am working with a single mode fiber at 830 nm with a NA of 0.12 (http://www.thorlabs.com/thorcat/1960...AutoCADPDF.pdf). One end has a fiber tip coated in silver with a small hole of 200 nm diameter...
View ArticleHow to calculate force of electric current on magnet
Hello, It is my understanding that a moving magnetic can induce an electrical current, and that conversely, and electrical current can move a magnet. I believe that this is the basis by which speakers...
View ArticleIs any Hamiltonian system integrable?
This is related to classical Hamiltonian mechanics. There is something wrong in the following argument but I cannot pinpoint where exactly the pitfall is: Consider an arbitrary (smooth) Hamiltonian...
View ArticleFinding x(t) of a particle subjected to gravitational force
Hello everybody. I registered today in this forum and this is my first post. I'm Italian, therefore sorry for my ugly english. Studying physics (for my personal curiosity) I proposed myself two...
View ArticleThermodynamic state entirely determined by only two quantities?
I am trying to understand why I can specify the specific volume [itex]v[/itex] of a fluid element as a function of the equilibrium pressure, [itex]p[/itex], and the equilibrium entropy, [itex]s[/itex]....
View ArticleIonisation
I understand that when an electron is excited it goes to a higher energy level and then relaxes to ground state releasing a photon; however, after ionisation of an electron takes place, where does the...
View Articlenew aether experiments
What are your opinions about these two experiments described at: http://adsind.wordpress.com? Can they be used to reject some of the aether theories?
View ArticleOhm's Law, Circuits, and Wires confusion
I can do circuit problems, but conceptually I cannot figure out what is going on from a basic physics perspective, with respect to the following: Say you have a circuit with a battery (emf = V) and a...
View ArticleE&M simple polarizability question
this is a homework problem i realized after posting it. so could a moderator please move this question to the hw section? thanks one of Griffiths' example: A primitive model for an atom consists of a...
View ArticleSoft X-rays
what is the reason of soft x-rays, Is it because when a accelerated electron approaches an atom the electrons' electric field repel the incoming electron causing deceleration and also i scattering...
View ArticleEddies Current!
Hey guys I'm looking for. Some more info on eddies current. I understand how it works but all the examples I see use flat objects (coin shaped). Will eddies current still work in shapes like a sphere...
View ArticleConducting spheroid in uniform electric field
I want to calculate the field distortion caused by placing a conducting spheroid in a uniform electric field. The field direction is taken to be the z axis. I'm using oblate spheroidal coordinates and...
View ArticlePressure and Weight in Water Tank
Hi all, Can someone clarify whether the following is right? Assume a Cylindrical tank with a base area of 2000 sq.cm, is filled with water upto 15 metres ( tank starts from ground level) 1) The...
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Equilibrium Stat Mech Vs. Kinetics
Figured it out thanks, next post: Attached Images Energy.png (4.0 KB)
View ArticleVertical spring statistical mechanics
Consider the following problem: A spring with spring constant ##k## is suspended vertically from a fixed support and the spring is in equilibrium with a heat bath of temperature ##T## and resides in a...
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