The magnetic flux and the induce emf in the dynamo.

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Homework Help Overview

The discussion revolves around a multiple-choice question related to magnetic flux and induced electromotive force (emf) in the context of a dynamo. Participants are exploring the relationship between the orientation of a coil and the magnetic flux it experiences.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants discuss the conditions under which induced emf is maximized and question the concept of flux linkage, particularly when the coil is oriented parallel to the magnetic field lines.

Discussion Status

The conversation includes attempts to clarify the meaning of flux linkage and its implications for the induced emf. Some participants express uncertainty about the definitions and relationships involved, while others provide affirmations and seek further clarification.

Contextual Notes

There appears to be confusion regarding the definitions of magnetic flux and flux linkage, particularly in relation to the orientation of the coil in a magnetic field. The original poster and other participants are navigating these concepts without reaching a definitive conclusion.

Asmaa Mohammad
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Homework Statement


Multiple-choice question:
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Homework Equations

The Attempt at a Solution


I know that the induced emf is maximum when the coil is parallel to the direction of the magnetic flux, so I should choose either B or C, and I have read the the rate by which the coil cut the magnetic flux is maximum when it is parallel to the direction of the flux, So I would choose C, is my answer correct? Because I am not sure about the point of the magnetic flux.
 
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Asmaa Mohammad said:
I know that the induced emf is maximum when the coil is parallel to the direction of the magnetic flux
Yes.
Asmaa Mohammad said:
have read the the rate by which the coil cut the magnetic flux is maximum when it is parallel to the direction of the flux,
Yes.

What is the flux linking with the coil when it is parallel to the field?
 
cnh1995 said:
What is the flux linking with the coil when it is parallel to the field?
Excuse me, but I don't understand the term "flux linkage".
 
Asmaa Mohammad said:
Excuse me, but I don't understand the term "flux linkage".
Flux linkage of a loop means the flux linking with the loop i.e. the flux passing through the loop.
What is this flux linkage when the coil is parallel to the field lines?
 
cnh1995 said:
Flux linkage of a loop means the flux linking with the loop i.e. the flux passing through the loop.
What is this flux linkage when the coil is parallel to the field lines?
Hmm, I don't know, might be a maximum value? Right?
 
Asmaa Mohammad said:
Hmm, I don't know, might be a maximum value? Right?
images (7).jpg

What is the flux linking with the coil?
 
Zero?!
In a coiled wire the flux linkage will be maximum when the coil is perpendicular to the magnetic flux, and it will be zero when it is parallel to the magnetic flux.
Do you mean that in dynamo coils it is the same?
 
Asmaa Mohammad said:
Zero?!
In a coiled wire the flux linkage will be maximum when the coil is perpendicular to the magnetic flux, and it will be zero when it is parallel to the magnetic flux.
Do you mean that in dynamo coils it is the same?
Yes and yes.
 
cnh1995 said:
Yes and yes.
OK and Ok.
Thank you!
 

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