Recent content by trilex987

Thank you both, but you are talking about force as a function of time only. What I'm talking is a force as a function of both space and time. For example. an electrode with a time changing electric field, and force upon a free charge. As the charge moves away from its initial position, it...

Hi there If an object is affected by space-dependent force (for example wind , or electric field, or whatever), one can calculate its speed at any point in space by integrating the acceleration along its path, but what about if the force was time dependent , like for example an AC electric...

Greetings I've been reading about these magnets such as these: http://www.lanl.gov/orgs/mpa/nhmfl/magnets.shtml Take a look at the pulse durations (it says in notes at the bottom "Total pulse length including decay" It's all nice but I don't understand one thing. How can they make...

...just an update... while comparing this to the frog experiment I mad a silly error, I assumed they were levitating the frog using radial force in a horizontal tube, but the tube was vertical and the put the frog in the "sweet spot" and used vertical component near the end of the solenoid. So...

Greetings. I've been doing some things for the past couple of weeks just for fun, but I have no way of knowing if I'm on the right track or not, so if anyone is willing to take a glimpse, feel free to point out any errors or say harsh thing, or throw tomatoes at me, because I need some...

No, no, sorry, I formulated my last question incorrectly, I meant would the load cause a counter-potential which would reduce the current in the superconductor. In other words, after you induce current in the superconductor, would you need a power source to keep the object above levitating...

Hi, here is a couple of questions about superconductors Each superconducting material has a rating for critical field intensity. Now, does the field generated by its own current count? And also what is the current superconducting (type II) material with highest current densities achieved...

I think it finally works. Now I've calculated force using the approach I posted in the previous post, yesterday. I've checked it on couple of places along the z axis, by comparing it to the on-axis formula for H and dB/Dz , and the results are identical. I have no way of checking whether...

I think I'm slowly getting a little bit over my head, I'm not formally educated in physics But before I give up on this, I'll ask a few more questions. Would this be the right way to calculate the force vector, I think this is the development of the grad ( m dot B) for dummies like me, to a...

Hm... the actual force vector is the gradient of the dot product of mag dipole vector and field (induction) vector... so, would it be correct to simply make a dot product of the field and dipole, and then use the derivative of that as the force vector?

Actually, I think the two gradients I came up with are neither of the 4 you mentioned. What these two are , are x and y gradients of the magnitude of field, rather than gradients of the components of the field vector. I think for calculation of force, these are the two I need (gradients of...

I revisited the first equation I used. Actually the problem wasn't in the coordinate system. The equation is formulated for cylindrical system (not spherical), the problem was in wrong definition of Alpha, as you said. But It's not my fault, I just copied what was on that site. The Equation...

I think this one is right At least it matches the usual on-axis approximation formula, on axis. http://img362.imageshack.us/img362/8100/90308956sv9.jpg These expressions are for Field/(Field in center) (that's why there's a a/pi in the beginning) These are taken from Electromagnetic Theory...

Nevermind, I have found the right equations. These were faulty (I should give notice to the author of that web page). I managed to come up with expressions for distribution of force , but they are huge, nothing one could ever hope to do on paper. It takes about several pages of a Word-type...

First of all, this is not homework (before anyone suspects). I'm just doing this out of hobby and expanding my education. I've been trying to come up with distilled expressions for force on a magnetic dipole , anywhere in space around a simple coil. I started out with these expressions...