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Physics · Triple Science

Magnetism and Electromagnetism

Spec 4.7 Paper 2 📙 Higher

Subtopics

Poles of a Magnet and Permanent MagnetismSpec 6.7.1.1Describe the properties of magnets, distinguish permanent from induced magnetism, and describe magnetic forces. + Magnetic FieldsSpec 6.7.1.2Describe magnetic fields, draw field line patterns and explain how they show force and direction. + ElectromagnetismSpec 6.7.2.1Describe the magnetic field around a current-carrying wire, solenoid and electromagnet. + Fleming's Left-Hand Rule and the Motor EffectSpec 6.7.2.2Apply Fleming's Left-Hand Rule to predict force on a current-carrying conductor in a magnetic field. + Electric MotorsSpec 6.7.2.3Explain how the motor effect causes a coil to rotate in an electric motor. + Loudspeakers and HeadphonesSpec 6.7.2.4 (HT only, physics only)Describe how loudspeakers and headphones use the motor effect to produce sound. + Induced Potential and the Generator EffectSpec 6.7.3.1 (HT only, physics only)Describe how a potential difference is induced when magnetic flux through a conductor changes. + Uses of the Generator EffectSpec 6.7.3.2 (HT only, physics only)Describe alternators, dynamos and their role as generators of electrical power. + MicrophonesSpec 6.7.3.3 (HT only, physics only)Describe how microphones use electromagnetic induction to convert sound into electrical signals. + TransformersSpec 6.7.3.4 (HT only, physics only)Describe how transformers work and use the transformer equation to solve problems. +

💡 Click a subtopic or the + to open the full notes, quiz and examples.

Key Equations

F = BIL

Vp/Vs = Np/Ns

Vp × Ip = Vs × Is (100% efficiency)

⭐ Higher Tier Content

Induced EMF and flux

Transformer efficiency calculations

🔬 Triple Science Extensions

Loudspeakers

Induced potential

Generator effect

Microphones

Transformers

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