Sarahisme

oh wait, is Ipeak = Vpeak/XL ??

hey could i have some hints/help with this? .... in the next 40 mins would be great (nah sorry guys i'm being unreasonable...)

e is electromotive force (emf n is number of turns b is magnetic field strength a is area and w (omega) is angular speed/velocity t = time

hahah thats cool, where'd you get that?

its a standard forumla in any physics text

any hints? pwease

R is resistance, L is the length of the wire and A is the cross sectional area of the wire

i did for the other questions though

this one i am not so sure about...or not confident enough to try and explain it

for 1) it is because resistance is proportional to the length of the wire and for 2) it is because the power drop across a resistor goes as V^2/R

my answer: e -Sarah

my answers: 1) c 2) c hows that? (cricket anyone ) -Sarah

here i another 2 questions, how'd i go for these ones?

here are a quick to questions, how'd i do?

thanks that sounds great, would you be able to point me to some more info on these induction generators which don't require brushes?

hey if i have a simple ac generator (i.e. a coil of wire roating in between two magnets), to get power out of it i need to connect the wire to a thing called a "commutator", is that right? i can't quite figure out exactly how this all works... -Sarah

however what i want to do is work out how much energy i can generate from this generator. I know it has something to do with the emf induced in the wire, but i don't know how to work it out. Not to sound too panicky, but i really need to work this out ASAP. aghhh... *stress stress stress*

now i think i have figured out that the emf that will be induced in the wire when it is spun around in the magnetic field created by the magnets will be given by this equation...

ok , i accidently posted some stuff in another thread when i meant to post here....anyways this is the design of my generator...

oops posted in wrong thread

how would you work out the induced emf in the loop(s) of wire if you spun it around in the magnetic field created by those 2 magnets? (the magnets are held stationary)??

ok i think the main equation to be used is the "General equation for motional emf", however i am not quite sure how to apply it.... anyways this was the design i was thinking of ... (i have decided to make a simple theoretical generator first)...

oh ok, lol , thats cool

thanks douglas