The magnetic flux and the induce emf in the dynamo.

[Asmaa Mohammad]

Homework Statement

Multiple-choice question:

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.

 

[cnh1995]

I know that the induced emf is maximum when the coil is parallel to the direction of the magnetic flux

Yes.

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?

 

[Asmaa Mohammad]

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".

 

[cnh1995]

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?

 

[Asmaa Mohammad]

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?

 

[cnh1995]

Hmm, I don't know, might be a maximum value? Right?

What is the flux linking with the coil?

 

[Asmaa Mohammad]

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?

 

[cnh1995]

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.

 

[Asmaa Mohammad]

Yes and yes.

OK and Ok.
Thank you!