Permanent and induced magnetism, magnetic forces and fields common mistakes

Common mistakes

• generator-effect induction: avoid permanent and induced magnets

  Treating permanent and induced magnets as interchangeable when answering about generator-effect induction.

  Fix itInstead, identify the exact Unit 4.7 idea in Poles of a magnet, then explain how it links to a calculation using primary and secondary coils and the objective to describe the difference between permanent and induced magnets.

• generator-effect induction: avoid permanent and induced magnets

  Treating permanent and induced magnets as interchangeable when answering about generator-effect induction.

  Fix itInstead, identify the exact Unit 4.7 idea in Magnetic fields, then explain how it links to a bar magnet and plotting compass practical and the objective to define a magnetic field as the region around a magnet where a force acts on another magnet or on a magnetic material.

• generator-effect induction: avoid permanent and induced magnets

  Treating permanent and induced magnets as interchangeable when answering about generator-effect induction.

  Fix itInstead, identify the exact Unit 4.7 idea in Magnetic fields, then explain how it links to a steel core electromagnet demonstration and the objective to identify iron, steel, cobalt and nickel as magnetic materials named in the specification.

• generator-effect induction: avoid permanent and induced magnets

  Treating permanent and induced magnets as interchangeable when answering about generator-effect induction.

  Fix itInstead, identify the exact Unit 4.7 idea in Magnetic fields, then explain how it links to a current-carrying wire between magnetic poles and the objective to state that the force between a magnet and a magnetic material is always attraction.

• generator-effect induction: avoid permanent and induced magnets

  Treating permanent and induced magnets as interchangeable when answering about generator-effect induction.

  Fix itInstead, identify the exact Unit 4.7 idea in Magnetic fields, then explain how it links to a loudspeaker coil moving in a magnetic field and the objective to describe how magnetic field strength depends on distance from the magnet.

• generator-effect induction: avoid permanent and induced magnets

  Treating permanent and induced magnets as interchangeable when answering about generator-effect induction.

  Fix itInstead, identify the exact Unit 4.7 idea in Magnetic fields, then explain how it links to an alternator producing an AC output trace and the objective to state that a magnetic field is strongest at the poles of a magnet.

• generator-effect induction: avoid permanent and induced magnets

  Treating permanent and induced magnets as interchangeable when answering about generator-effect induction.

  Fix itInstead, identify the exact Unit 4.7 idea in Magnetic fields, then explain how it links to a dynamo producing a DC output trace and the objective to describe the direction of a magnetic field as the direction of the force on a north pole placed at that point.

• generator-effect induction: avoid permanent and induced magnets

  Treating permanent and induced magnets as interchangeable when answering about generator-effect induction.

  Fix itInstead, identify the exact Unit 4.7 idea in Magnetic fields, then explain how it links to a moving-coil microphone investigation and the objective to state that magnetic field lines go from the north-seeking pole to the south-seeking pole of a magnet.

• generator-effect induction: avoid permanent and induced magnets

  Treating permanent and induced magnets as interchangeable when answering about generator-effect induction.

  Fix itInstead, identify the exact Unit 4.7 idea in Magnetic fields, then explain how it links to a step-up transformer on the National Grid and the objective to describe a magnetic compass as containing a small bar magnet.

• generator-effect induction: avoid permanent and induced magnets

  Treating permanent and induced magnets as interchangeable when answering about generator-effect induction.

  Fix itInstead, identify the exact Unit 4.7 idea in Magnetic fields, then explain how it links to a step-down transformer for a low-voltage device and the objective to state that the Earth has a magnetic field.