Recent content by AlexPilk

Thanks a lot :)

:biggrin: Haha, I didn't know this, it's fun :) But if a positively charged particle (like a proton) flies into a magnetic field - it's going to behave according to the left hand rule? I mean it would get pushed in the correct direction unlike an electron. What about a neutron? SInce it has no...

Oh, you mean electrons actually flow from - to + but we supposed stuff flows from + to - ?

You mean current is actually a flow of positively charged particles?

One more question, I just can't fully understand it. If you have a wire in a magnetic field with some current going through it - the direction of the force will be according to the left (or sometimes called right) hand rule. But it would be opposite for a single electron, right? If current is a...

Oh, looked it up. KE = mc^2 - m0c^2 = 1.05*10^-30*9*10^16 - 9.1*10^-31*9*10^16 = 1.26*10^-14 J Now I have to figure what "total energy" means. KE = Total energy - Potential energy, so I suppose m(rel)*c^2 = 9.45*10^-14 is total energy like I wrote in the previous message? I hope it's correct now? :)

Thanks!

Right, got it. So then I should plug in relativistic mass as m into K = mv^2/2 and E=mc^2 and get the kinetic and total energies? Then m = 9.1*10^-31/sqrt(75) = 1.05 * 10^-30 Total energy E = 1.05*10^-30*9*10^16 = 9.45*10^-14 Kinetic energy K = (1.05*10^-30*0.25*9*10^8)/2 = 1.18*10^-22 Or am I...

Thank you :) If the charge is negative - then Lorentz force should act in the opposite direction (out of the screen)?

Hm, but why? On wikipedia the equation is m(rel)/m(rest) = gamma, so gamma*m(rest) = m(rel)

Ok, then m(rel) = gamma*m(rest) gamma = sqrt(1-0.25) = sqrt(0.75) m(rel) = sqrt(0.75)*9.1*10^-31 = 7.88*10^-31 Is it correct now?

I have a ton of stuff to figure out by myself in a short period of time, so sorry for stupid questions :( I don't remember anything about relativistic mass from school. So gamma is also relativistic mass/rest mass?

I'm not sure what equation you mean. I found p = mv*gamma, but I don't understand what gamma means there.

Homework Statement A resting electron was sped up to 0.5 of the speed of light. Find: A. relativistic mass of the electron, B. total energy of the electron, C. kinetic energy of the electron. Homework Equations K = mv^2/2 E=mc^2 The Attempt at a Solution Let’s first find the kinetic energy...

Hi! I'm getting ready for an exam and want to make sure if I solved some problems correctly. I would be grateful for your feedback :smile: 1. Homework Statement After going through potential difference of 5000 V an electron falls in uniform magnetic field. It’s induction is 0.1T and the...