EMF calculations (1 Viewer)

[cutemouse]

I was looking at two textbooks (Macmillian and revised Jacaranda) and I noticed that Jacaranda didn't have anything to do with EMF, whilst Macmillian did.

Has EMF calculations been taken out of the Physics course?

 

[Trebla]

Yes.

However, you do need to understand emf conceptually and know when it is maximum or minimum, so some textbooks use the equation to prove it mathematically.

 

[cutemouse]

Hmm okay thanks... I don't think the syllabus has any reference to EMF (but does to magnetic flux).

What is the difference between EMF and voltage?

 

[youngminii]

I thought it was like, EMF pretty much IS Voltage.
As in, in a current, you can think of Voltage as the 'force pushing the electrons'.
And EMF is also a force that does that.
Myeh, just wait for Trebla's response.

 

[cutemouse]

Well I know in Chemistry EMF is pretty much voltage. But I think it's different because Chemistry deals with electron flow (galvanic cells) but yeah I'll wait for Trebla.

 

[Forbidden.]

回复: Re: EMF calculations

Hmm okay thanks... I don't think the syllabus has any reference to EMF (but does to magnetic flux).

What is the difference between EMF and voltage?

I don't quite remember but potential difference and EMF are 'voltages' but different in the way they act.
It was explained in the Excel HSC Physics study guide.

I thought it was like, EMF pretty much IS Voltage.
As in, in a current, you can think of Voltage as the 'force pushing the electrons'.
And EMF is also a force that does that.
Myeh, just wait for Trebla's response.

N.B.

The unfortunate mistake of Electromotive Force (EMV) leads to some students believing it is a 'force' due to its historical usage which of course isn't.
It is expressed in terms of potential difference.

 

[cutemouse]

Hello again,

I have another question.... Are RMS stuff now out of the HSC Course? Because I remember that it was in prelim.

Sigh, it would be so much easier if I could get a list of changes from the 2000 syllabus!!