10.4 Chapter summary
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10.3 Faraday's law of electromagnetic induction
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End of chapter exercises
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10.4 Chapter summary (ESBQ4)
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Electromagnetism is the study of the properties and relationship between electric currents and magnetism.
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A current-carrying conductor will produce a magnetic field around the conductor.
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The direction of the magnetic field is found by using the Right Hand Rule.
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Electromagnets are temporary magnets formed by current-carrying conductors.
- The magnetic flux through a surface is the product of the component of the magnetic field normal to the surface and the surface area, \(\phi = BA\cos(\theta)\).
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Electromagnetic induction occurs when a changing magnetic field induces a voltage in a current-carrying conductor.
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The magnitude of the induced emf is given by Faraday's law of electromagnetic induction: \(\mathcal{E}=-N\frac{\Delta\phi}{\Delta t}\)
| Physical Quantities | ||
| Quantity | Unit name | Unit symbol |
| Induced emf (\(\mathcal{E}\)) | Volt | \(\text{V}\) |
| Magnetic field (\(B\)) | Tesla | \(\text{T}\) |
| Magnetic flux (\(\phi\)) | Weber | \(\text{Wb}\) |
| Time (\(t\)) | seconds | \(\text{s}\) |
Table 10.1: Units used in electromagnetism
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10.3 Faraday's law of electromagnetic induction
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End of chapter exercises
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