• Congratulations to the Class of 2024 on your results!
    Let us know how you went here
    Got a question about your uni preferences? Ask us here

Need Help Here :) (1 Viewer)

someth1ng

Retired Nov '14
Joined
Sep 18, 2010
Messages
5,558
Location
Adelaide, Australia
Gender
Male
HSC
2012
Uni Grad
2021
I just realised that the correct way to do it is:

The change of flux is equal to emf which is proportional to current. Doubling the loops means would the area which equates to doubles the change of flux.

emf = n delta(BA)/delta(t)
 

barbernator

Active Member
Joined
Sep 13, 2010
Messages
1,439
Gender
Male
HSC
2012
I just realised that the correct way to do it is:

The change of flux is equal to emf which is proportional to current. Doubling the loops means would the area which equates to doubles the change of flux.

emf = n delta(BA)/delta(t)
awesome :)
 

Fizzy_Cyst

Owner @ Sigma Science + Phys Goat
Joined
Jan 14, 2011
Messages
1,212
Location
Parramatta, NSW
Gender
Male
HSC
2001
Uni Grad
2005
I just realised that the correct way to do it is:

The change of flux is equal to emf which is proportional to current. Doubling the loops means would the area which equates to doubles the change of flux.

emf = n delta(BA)/delta(t)
Fair enough EMF would be 4x, (2x due to magnets and 2x due to coil), but if you now have twice the length of coil, wouldnt resistance of the coil then be doubled, as resistance is proportional to length? Therefore effectively cancelling out the doubling of the EMF? :)
 

someth1ng

Retired Nov '14
Joined
Sep 18, 2010
Messages
5,558
Location
Adelaide, Australia
Gender
Male
HSC
2012
Uni Grad
2021
Fair enough EMF would be 4x, (2x due to magnets and 2x due to coil), but if you now have twice the length of coil, wouldn't resistance of the coil then be doubled, as resistance is proportional to length? Therefore effectively cancelling out the doubling of the EMF? :)
Ummm, I dunno if you're just trying to mind fuck me or being totally serious (LOL) because, isn't it assumed that resistance isn't included when doing these calculations?
 

Users Who Are Viewing This Thread (Users: 0, Guests: 1)

Top