Post by: 715761 on July 27, 2010, 09:05:55 pm
can anyone tell me, in EMF= NBAwsinwt,
what the mother the t stands for???
Thanks :)
Post by: Whatlol on July 27, 2010, 09:13:35 pm
Hey guys....
can anyone tell me, in EMF= NBAwsinwt,
what the mother the t stands for???
Thanks :)
t is the time.
also i did a problem involving this formula
http://vcenotes.com/forum/index.php?topic=27720.msg285030#msg285030
not sure if your doing the same one but that may help you.
Post by: pooshwaltzer on July 27, 2010, 09:30:25 pm
wt = frequency of the sinusoid in terms of radians per second, NOT degrees...just be careful...irks me when my students fail to reconcile that distinction and lose out on easy marks.
Post by: Whatlol on July 27, 2010, 09:33:06 pm
For NBAwsinwt,
wt = frequency of the sinusoid in terms of radians per second, NOT degrees...just be careful...irks me when my students fail to reconcile that distinction and lose out on easy marks.
my main problem is i couldnt do these style of calculations on my scientific calculator because im not sure how to use radians mode on it... /:
Post by: 715761 on July 27, 2010, 09:55:04 pm
Just looking at the rough notes my teacher's given us, I'm thinking perhaps he's explained it to us wrong (sadly, not an unusual occurence)
and this could also be contributing to my failure with questions relating to this...
(Whatlol, I was actually doing that problem you mentioned 10 minutes ago and I gave up on it... still don't quite understand :P)(I swear I'm not this bad a physics usually.... lol...)
-I take it back, I understand that other problem now... (or at least I reached the right answer) -
Post by: Whatlol on July 27, 2010, 10:03:57 pm
Could either of you give me a specific example of how to use this formula?
Just looking at the rough notes my teacher's given us, I'm thinking perhaps he's explained it to us wrong (sadly, not an unusual occurence)
and this could also be contributing to my failure with questions relating to this...
(Whatlol, I was actually doing that problem you mentioned 10 minutes ago and I gave up on it... still don't quite understand :P)(I swear I'm not this bad a physics usually.... lol...)
-I take it back, I understand that other problem now... (or at least I reached the right answer) -
Do you want to give us the problem you have so we can try help or is there a specific part you dont understand exactly?
Ill just list some things you may have trouble with.
Firstly, finding angular momentum (
Now the time , is a bit harder. So what you need to do is first of all find the period, this is the time taken for one rotation. The period is 1 / F Now in the example of that other question, you wanted to find the emf generated at 90degrees. 90 degrees is the same as 1/4 of a circle, so you just divide the period by 4.
Hope that helps
Post by: 715761 on July 27, 2010, 10:15:33 pm
URGH! Thankyou!!!! (again)
Post by: Whatlol on July 27, 2010, 10:21:57 pm
YES.
URGH! Thankyou!!!! (again)
no problems !