How to differentiate magnetic flux to find emf? Watch

username970964
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#1
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The answer of Φ=BA is 0.03 Wb but I need to find the EMF value so e=-dΦ/dt. But if I differentiate it then it becomes 0? That seems wrong. I can't do the question any other way because I don't have enough data, I only have the values of R,v,l &B.
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Stonebridge
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(Original post by Airess3)
The answer of Φ=BA is 0.03 Wb but I need to find the EMF value so e=-dΦ/dt. But if I differentiate it then it becomes 0? That seems wrong. I can't do the question any other way because I don't have enough data, I only have the values of R,v,l &B.
Post the whole question please.
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uberteknik
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(Original post by Airess3)
The answer of Φ=BA is 0.03 Wb but I need to find the EMF value so e=-dΦ/dt. But if I differentiate it then it becomes 0? That seems wrong. I can't do the question any other way because I don't have enough data, I only have the values of R,v,l &B.
Please post the full question.

You only ever post snippets.
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Arbolus
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You need to find an equation for how the magnetic flux changes over time. If it doesn't change, by definition there can't be any induced EMF.
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username970964
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Error.
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username970964
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(Original post by uberteknik)
Please post the full question.

You only ever post snippets.
I've just posted it .
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username970964
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(Original post by Stonebridge)
Post the whole question please.
I've posted it.
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