nestea, keep working at it. Go as far as you think you need to go with this in order to do what is asked by the assignment. Don't take what I said in the first post as the correct answer or the correct path, as it took me A LOT more work to finally figure it out after I made the post and...
I did not explain that it was an "envelope," (didnt know what one was) but i did explain what the lines had to do with the parabola thingy as best as I could. Note where the intersections of two lines can be, and note what would make the shape happen. Yes, I did prove it in the general case with...
Thank you for the link!
I solved it a while ago and basically found what is described as an "envelope," then proved it in the general case, etc. ,etc. I got the highest grade of 20/20 :D (very difficult, apparently only 6 people from my school have gotten it in like.. 5 years?). Its nice to...
Haha it's fine. If you think about it, the two definitions of B are weirdly equivalent. Setting them equal to each other gives you N/l=1/2πr. 2πr is the circumference of the circular loops, N is the number of loops and l is also the height of the cylinder.
Thank you for your help, though =].
Well instead of I0, I used V0/R, just out of preference and the situation.
Also, I just found multiple sites that say, for a solenoid:
B=μ0NI/l
Is that somehow equivalent to the other formula for the magnetic field of a solenoid or was there a mistake?
Ok so you're saying that
emf=-NA*dI/dt*μ0/(2πr).
The current in my situation is a regular AC current, so it changes according to
I=I0cos(2πft)
should apply.
dI0cos(2πft)/dt = -I02πf*sin(2πft)
if my math/brain is correct, that essentially gets me back to the answer I had before.
So was my end...
Homework Statement
This problem arises from a much larger essay/lab/project thing. I know that there is an induced current in the wire of an AC electromagnet because the magnetic field is constantly changing along with the AC current, so it makes sense to me that will produce a constantly...
Note: I didn't use the template because I feel it did not fit the question well enough.
This is concerning a system of linear equations in two variables where its constants in " ax+by=c " form show a geometric sequence, i.e. " nx + any = a2n ".
Another way of putting this is " y=(-1/a)x + a...