Recent content by MickOtto

Ok, I see what they do in the solutions now. They use trig and get R for the magnetic field (giving it value 1.08cm) the use qvB=mv^2/R, solve for B and get the answer. I know my way is a lot messier than that, but why doesn't it work?

Homework Statement The Picture tube in an old black and white TV uses magnetic deflection coils rather than electric plates. Suppose an electron beam is accelerated from rest through a 50kV potential difference and then through a region with uniform magnetic field 1cm wide. The screen is...

Hmm, whenever I do my right hand rule I end up with the 0 for the normal magnetic field. Maybe I have a different idea of what edge effects are.. Thanks for your help. Yes, I know it's not derived. This part is just me trying to explain what is happening. My derivations for other parts of the...

Homework Statement In a lab I passed a magnet through a coil and measured the voltage. I need/want to know why when moving a magnet through a coil you induce a current. I don't necessarily need a direct answer - I more just want to know if my argument holds and where to look if I'm...