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# Throughaloopchangesan b change the b field change a

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Unformatted text preview: s passing through the surface There are many ways to change this… There Physics 212 Lecture 17, Slide 5 Physics 212 Lecture 17, Slide Faraday’s Law: dΦ B emf = ∫ E ⋅ d = − dt where Φ B ≡ ∫ B ⋅ dA In Practical Words: 1) When the flux ΦB through a loop changes, an emf is induced in the loop. through a loop changes, an B Change the B field Change A Physics 212 Lecture 17, Slide 6 Physics 212 Lecture 17, Slide Faraday’s Law: dΦ B emf = ∫ E ⋅ d = − dt where Φ B ≡ ∫ B ⋅ dA In Practical Words: 1) When the flux ΦB through a loop changes, an emf is induced in the loop. through a loop changes, an B Move loop to a place where Move the B field is different the A Physics 212 Lecture 17, Slide 7 Physics 212 Lecture 17, Slide Faraday’s Law: dΦ B emf = ∫ E ⋅ d = − dt where Φ B ≡ ∫ B ⋅ dA In Practical Words: 1) When the flux ΦB through a loop changes, an emf is induced in the loop. through a loop changes, an B Rotate the loop A Physics 212 Lecture 17, Slide 8 Physics 212 Lecture 17, Slide Faraday’s Law: dΦ B emf = ∫ E ⋅ d = − dt where Φ B ≡ B ⋅ dA In Practical Words: 1) When the flux ΦB through a loop changes, an emf is induced in the loop. 1) When the flux through a loop changes, an B Rotate the loop A Physics 212 Lecture 17, Slide 9 Physics 212 Lecture 17, Slide Faraday’s Law: dΦ B emf = ∫ E ⋅ d = − dt where Φ B ≡ ∫ B ⋅ dA In Practical Words: 1) When the flux ΦB through a loop changes, an emf is induced in the loop. through a loop changes, an B Rotate the loop A Physics 212 Lecture 17, Slide 10 Physics 212 Lecture 17, Slide Faraday’s Law: dΦ B emf = ∫ E ⋅ d = − dt where Φ B ≡ ∫ B ⋅ dA In Practical Words: 1) When the flux ΦB through a loop changes, an emf is induced in the loop. through a loop changes, an 2) The emf will make a current flow if it can (like a battery). I Physics 212 Lecture 17, Slide 11 Physics 212 Lecture 17, Slide Checkpoint 1a A copper loop is placed in a uniform magnetic field as shown. You a...
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