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A Level Physics Tutor

Magnetic Flux Density and Flux Linkage

Introduction
 

Magnetic flux density describes the strength of a magnetic field, while magnetic flux linkage measures the total magnetic flux passing through a coil. These concepts are fundamental to electromagnetic induction and help explain how generators, transformers and many electrical devices operate. Understanding magnetic flux density and flux linkage provides the foundation for Faraday's Law and Lenz's Law later in the course.
 

AQA A Level Physics Specification: 3.7.4.1 Magnetic Flux Density and Flux Linkage
 

What You Need to Know
 

  • Define magnetic flux density and state its unit (tesla, T).

  • Understand magnetic flux as the product of magnetic flux density, area and the angle between the field and the normal to the surface.

  • Define magnetic flux linkage as the product of magnetic flux and the number of turns in a coil.

  • Calculate magnetic flux and magnetic flux linkage.

  • Explain how changing magnetic flux linkage leads to electromagnetic induction.

  • Describe how magnetic flux linkage depends on magnetic field strength, coil area and the orientation of the coil.

  • Apply equations involving magnetic flux density, magnetic flux and flux linkage.

  • Solve quantitative problems involving magnetic fields and coils.
     

Downloadable Topic Pack
 

Magnetic Flux Density and Flux Linkage Topic Pack Exam Questions and Answers

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