Recent content by Repainted

This. I'm pretty sure for the original integral form of Faraday's Law, its not about the magnetic field strength varying with time, but rather the magnetic FLUX through the coil (varying with time). And that shouldn't be a problem in calculation using only the Lorentz Force Law. So in other...

Hey guys, I think we're missing the main question here, which is to put it rather crudely, can Faraday's Law of Induction be derived from the Lorentz Force Law(or maybe the other way around)? The short answer is probably no, but look at it this way. First of all, the original integral form...

Are you sure? I've always thought that the Lorentz Force Law was needed in addition to Maxwell's Equations and cannot be derived from them. Maxwell's equations tell you what the fields are (if you solve them for every point in space and time), and the Lorentz Force Law tells you how the fields...

Erm... I'm pretty sure the thread starter isn't talking about Ampere's Force Law and Faraday's Force Law(personally, I've never heard of a Faraday's Force Law), but IS talking about the ones in Maxwell's set of equations. What his question is, if I were to attempt to reiterate, is that the...

I did check out the course information and stuff on their website, but I didn't attend the open house, if that is what you mean. I did consider it as an option.

Thats right, Biot-Savart and Coulomb's law are good approximations for the E-fields of slow moving charges, obviously the faster the charges are moving, the less accurate they become. I don't get what you mean. Your first statement contradicts your second. Y.) and Z.) are solutions from...

X.) Yes. Though I should say its not that it SHOULD be replaced, it just can be replaced. We normally use Vector Identities to simplify things, and not substitute directly. For example, we can take the curl on both sides of 3, then sub in the curl(B) from 4. Y.) No. Z.) No. Q.) Yes...

1) Already gave that to you. Check the previous post. 2) I have no idea what you're saying. Classical Electrodynamics is the basis for which the Lorentz transforms were developed the first time. 3) When we solved for E, we wanted to find it in terms of the velocity and acceleration of the...

No. You solve Maxwell's equations to obtain an expression for the E and B. These were taken from the Wikipedia link that you obviously didn't read(and have been posted twice in the thread). I think you might want to know what the the symbols mean(again from Wikipedia): is the...

Wait so is the answer: 1. Magnetic fields never do work. or 2. Magnetic fields do no work by themselves? I'm guessing the answer is 2, because let's say if I have a square coil of wire, and I rotate it in a constant B-field, the magnitude of the velocity of a charge in the coil will simply...

g) You are right to say that the KE is at a maximum when the velocity is at a maximum(in magnitude). Hence the angle in the cosine function of v(t) must be an integer multiple of pi. Which leads to t = 1.5(I don't know how you got t = 4?), or if you know your trig, you can simply conclude that...

I see. As of now I have little interest in applied Physics as well, but that scholarship looked interesting since there was no bond and all. And yeah I am also more inclined towards the theoretical aspects of Physics as well. Either way thanks for you help and I will post again if I have more...

In a regular pendulum motion(the A path), the tension in the web would depend on the angle of elevation at that point in time. So you end up with T = W sin(a), where T is the tension and W is the weight of spiderman, a is angle of elevation. Now to travel in a straight path(B path), the total...

Thanks you for your reply! Yes, I did realize, upon reading some university texts in my free time, the amount of mathematics in Physics is a lot more at the university level than at the A-level. That is a good thing at any rate as A-level physics(or science for that matter) was rather...

Hello all. As a Singaporean who has just received his 'A' level results, I am currently wondering if the NUS Physics faculty has a good reputation globally. An online search seemed to show that it stood around the mid region overall (ranked 30 or so). The question that bothers me is whether or...