Quick Question about EMF

[715761]

Hey guys....

can anyone tell me,  in EMF= NBAwsinwt,

what the mother the t stands for???

Thanks

[Whatlol]

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.

[pooshwaltzer]

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.

[Whatlol]

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... /:

[715761]

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 )(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) -

[Whatlol]

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 )(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 () you simply multiply the frequency (Hz) by . This is because the frequency is the number of rotations per second. But angular speed has the units of radians per second so you just multiply by

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

[715761]

YES.

URGH! Thankyou!!!! (again)

[Whatlol]

YES.

URGH! Thankyou!!!! (again)

no problems !