Link to our latest notes and resources: https://drive.google.com/drive/u/2/folders/15FnZdp3NJ15WmXnkrSWgi5ltd5rUI9Bg 20 Magnetic fields 20.1 Concept of a magnetic field Candidates should be able to: 1 understand that a magnetic field is an example of a field of force produced either by moving charges or by permanent magnets 2 represent a magnetic field by field lines 20.2 Force on a current-carrying conductor Candidates should be able to: 1 understand that a force might act on a current-carrying conductor placed in a magnetic field 2 recall and use the equation F = BIL sin θ, with directions as interpreted by Fleming’s left-hand rule 3 define magnetic flux density as the force acting per unit current per unit length on a wire placed at rightangles to the magnetic field 20.3 Force on a moving charge Candidates should be able to: 1 determine the direction of the force on a charge moving in a magnetic field 2 recall and use F = BQv sin θ 3 understand the origin of the Hall voltage and d

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