Mausam
- 27
- 3
This is not a homework.i am not able to understand rotating motional emf .so could u please tell why could we use the effective length to calculate emf in this case .
EMI potential difference question
- Context: Undergrad
- Thread starter Mausam
- Start date
Join the discussion
Ask a follow-up here, or get your own question answered by working scientists, mathematicians and engineers — people, not an autocomplete.
Real named experts · corrections over time · the nuance an AI answer skips
8 replies · 2K views
Gold Member
- 3,489
- 1,173
Is that problem from H C Verma?
Maybe that is an easier approach, but not the only one. It can also be solved using the straightforward calculus method. Is the answer given?Mausam said:
Last edited:
Mausam
- 27
- 3
Please can anyone help me to prove that in this case the shape doesn't matter and hence effective length can be used to calculate motional emf
Last edited:
Mausam
- 27
- 3
Thank you so much for your reply ,yes the answer is given, actually had a doubt that why can we use the effective length though the velocity of every point is different.i mean i am not able to prove that the shape doesn't matter ...so could u please help me prove it in this case ,i am able to prove it when there is no rotation. This is from DC PANDEYcnh1995 said:
I have attached the solution if it helps
Attachments
Gold Member
- 3,489
- 1,173
This effective length part can be proved using some calculus. Do you know how to set up a differential equation?Mausam said:
Mausam
- 27
- 3
Could u please elaborate
Mausam
- 27
- 3
If possible can u please elaborate on itcnh1995 said:
And is there any simple explanation...
I do know to set up and solve differential equations
Gold Member
- 3,489
- 1,173
Consider the section OCA only. Here, you want to show that arc-length AC is effectively equal to the straight line distance AC. What is the emf induced in the straight line AC if length AC=l?Mausam said:
Mausam
- 27
- 3
It's half(B)(w)L²cnh1995 said: