Learning objective
D.4.1 (HL)—Magnetic flux
• Magnetic flux: Φ=BA cosθ.
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D.4 Induction
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Learning objective
D.4.2 (HL)—Faraday’s law
• Faraday’s law: changing magnetic flux induces emf ε=-NΔΦ/Δt.
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Learning objective
D.4.3 (HL)—Motional emf
• Motional emf in a straight conductor: ε=BvL.
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Learning objective
D.4.4 (HL)—Lenz’s law
• Lenz’s law gives induced emf direction and reflects energy conservation. • Direction of induced emf opposes the change that produces it.
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Learning objective
D.4.5 (HL)—Rotating-coil emf
• Rotating coil in uniform magnetic field produces sinusoidal emf.
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Learning objective
D.4.6 (HL)—Rotation frequency and emf
• Increasing rotation frequency increases induced emf characteristics.
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