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Magnetic Fields - Calculating average induced emf

Average emf.jpg

Hmmmm I'm not sure how to do this question??
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Avatar for anujsr
anujsr
3
Original post by LeCroissant
Average emf.jpg

Hmmmm I'm not sure how to do this question??



IT is just NBA/time = both of which you have.
Original post by anujsr
IT is just NBA/time = both of which you have.


Oh okay, thank you! :smile:
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Avatar for anujsr
anujsr
3
Original post by LeCroissant
Oh okay, thank you! :smile:


how many marks is the question?
Original post by anujsr
how many marks is the question?


3 marks.

Which value of flux density would you use though? Because it moves from a position where the flux density is 9.0mT to a position where it is 23.0mT . Or would you just use the change in flux density (23mT - 9.0mT) in the equation?
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Avatar for anujsr
anujsr
3
Original post by LeCroissant
3 marks.

Which value of flux density would you use though? Because it moves from a position where the flux density is 9.0mT to a position where it is 23.0mT . Or would you just use the change in flux density (23mT - 9.0mT) in the equation?


The equation used is delta NBA/ delta time. So yes you would use 23mT-9mT.
Also note the use of the term average flux. Hence delta time. Hope this helps.

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