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Mar
18
accepted What really cause light/photons to appear slower in media?
Mar
18
accepted How does paper make sound when it is torn?
Mar
17
awarded  Critic
Mar
17
revised Direction of rotation of proton in magnetic field--opposite to a dipole
added 101 characters in body
Mar
16
revised Direction of rotation of proton in magnetic field--opposite to a dipole
added 1 characters in body
Mar
16
answered Direction of rotation of proton in magnetic field--opposite to a dipole
Nov
7
comment Charge on Sphere due to Contact with Capacitor
@RonMaimon Actually it's a simplified ping-pong resistor. It comes from this year's physics olympiad screening problem in my country, but it turns out to be too difficult.
Nov
7
comment Charge on Sphere due to Contact with Capacitor
Thanks a lot for your answer.. It takes me hours to understand your work, finally I understand it and I think it seems convincing!
Nov
7
awarded  Scholar
Nov
7
accepted Charge on Sphere due to Contact with Capacitor
Oct
24
comment Charge on Sphere due to Contact with Capacitor
I can follow your explanations, but I still don't know how to proceed to the end
Oct
24
comment Charge on Sphere due to Contact with Capacitor
I don't think we can generalize the case that easily, because a half cylinder or a hemisphere is different with a complete sphere. Because the case of a complete sphere is quite special, the dipole distribution cancels, therefore we need to consider the higher order effect.
Oct
16
comment Charge on Sphere due to Contact with Capacitor
I don't quite understand your method yet, but, sounds promising! I'm looking forward for the details
Oct
15
comment Charge on Sphere due to Contact with Capacitor
I've changed the title. Maybe what you meant by "induction" is en.wikipedia.org/wiki/Electrostatic_induction ? However I can still safely claim that it is an induction, the sphere and the plate in touch can be considered as one. Some charge will be induced on the sphere due to the other plate's field
Oct
15
revised Charge on Sphere due to Contact with Capacitor
edited title
Oct
15
revised Charge on Sphere due to Contact with Capacitor
edited tags
Oct
15
comment Charge on Sphere due to Contact with Capacitor
@Georg: Can u explain why? (i have thought of it for a while but couldn't find the mistake). About the egg, I've tried spinning a raw egg, and it turns out that it is more resistant to translation, as written in my blog.
Oct
13
revised Charge on Sphere due to Contact with Capacitor
edited title
Oct
13
revised Charge on Sphere due to Contact with Capacitor
added 117 characters in body
Oct
13
asked Charge on Sphere due to Contact with Capacitor