GCSE Physics Specification

OCR A J249

Section P4.1: Magnets and magnetic fields

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#P4.1a

describe the attraction and repulsion between unlike and like poles for permanent magnets

diagrams of magnetic field patterns around bar magnets to show attraction and repulsion

#P4.1b

describe the difference between permanent and induced magnets

#P4.1c

describe the characteristics of the magnetic field of a magnet, showing how strength and direction change from one point to another

diagrams to show how the strength of the field varies around them and ways of investigating this

#P4.1d

explain how the behaviour of a magnetic (dipping) compass is related to evidence that the core of the Earth must be magnetic

#P4.1e

describe how to show that a current can create a magnetic effect and describe the directions of the magnetic field around a conducting wire

#P4.1f

recall that the strength of the field depends on the current and the distance from the conductor

#P4.1g

explain how solenoid arrangements can enhance the magnetic effect