Have you ever heard "Electric Field of one turn Solenoid?
hi, guys:
Have you ever heard "Electric Field of one turn Solenoid"? Here is a example from MIT.
Click on the weblink: http://web.mit.edu/6.013_book/www/book.html
Click on the Chapter 10 in the left part of the screen...
hi, guys:
I am reading some notes of Electromagnetism. It claims that for a helix solenoid with N turns of wire, the distance between the successive coil is \Delta a, the total vertical length of the solenoid is d. The artical claims that if we apply a voltage v to this solenoid...
hi, Pardesi:
A point far from the point charge means that the electric potential caused by the point charge can be neglected; close to the plate means that its potential is near the potential of the plate. so it is also zero
The key point is that the potential caused by the point...
Because of the symmetry, the field line above the plate will be upwards. Assume you move the electron along the field lines. The electron will always accelerated along the field lines, i.e., the potential will decrease. The key issue here is the word "infinitely", it means that you can move an...
Thanks for your answer! In fact, I continue to read the following sections from http://web.mit.edu/6.013_book/www/book.html" and I find in Section 7.8 and 7.9, there are more detailed explanation about this question. The conclusion is that:
There are current density through the conduction...
hi, Meir Achuz:
Thank you very much for your reply. But in fact I am confused over what you have said. In the website of MIT, it states that there is no current density in the material, i.e., there is no \vec J. But you said
So it seems that your statement doesn't coincide with...
hi, guys:
Charge conservation Violated? It seems to be: The charge density inside a spherical volume changes from \rho at t=0, after period of time \tau , the charge density decrease to 0. However, the author claimed that during the processing there is no current density in the material...
hi, Tony:
Q_Goest is right. But the sentence, " It is a ratio of the mass given in the equation above, which is dependant on the balloon mass PLUS the mass of the gas." , has some problem. Because the ratio of the speed of the balloon is as the same as the "a", the acceleration upward. So...
hi, polystethylene:
Here is something you need: please read the weblink first; if you still have problem, please contact me! :smile:http://www.ece.rutgers.edu/~orfanidi/ewa/ch15.pdf"