Theme D: Fields
The chapter explores fields, particularly gravitational, electric, and magnetic fields, detailing the forces experienced by objects within these regions. It introduces significant laws such as Newton's law of universal gravitation, Coulomb's law, and the principles of electromagnetic induction. Concepts like field strength, potential energy, and orbital motion are extensively covered, enriched by practical applications in devices such as mass spectrometers and transformers.
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Sections
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What we have learnt
- Objects experience forces in fields without direct contact.
- The strength of gravitational forces can be calculated using Newton's law of universal gravitation.
- Electric fields exert forces on charges, while magnetic fields impact moving charges.
Key Concepts
- -- Gravitational Field Strength
- The gravitational force experienced per unit mass placed at a point in a gravitational field.
- -- Coulomb's Law
- A law stating that the electrostatic force between two point charges is proportional to the product of the charges and inversely proportional to the square of the distance between them.
- -- Lorentz Force
- The force experienced by a charged particle moving through electric and magnetic fields, given by the equation F = q(E + v x B).
- -- Electromagnetic Induction
- The process by which a changing magnetic field induces an electromotive force (emf) in a circuit, as described by Faraday's law.
Additional Learning Materials
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