The motor effect common mistakes

Common mistakes

• motor-effect force direction: avoid motors and generators

  Treating motors and generators as interchangeable when answering about motor-effect force direction.

  Fix itInstead, identify the exact Unit 4.7 idea in Electromagnetism, then explain how it links to a bar magnet and plotting compass practical and the objective to state that when a current flows through a conducting wire a magnetic field is produced around the wire.

• motor-effect force direction: avoid motors and generators

  Treating motors and generators as interchangeable when answering about motor-effect force direction.

  Fix itInstead, identify the exact Unit 4.7 idea in Electromagnetism, then explain how it links to a steel core electromagnet demonstration and the objective to describe how the strength of the magnetic field around a wire depends on current through the wire.

• motor-effect force direction: avoid motors and generators

  Treating motors and generators as interchangeable when answering about motor-effect force direction.

  Fix itInstead, identify the exact Unit 4.7 idea in Electromagnetism, then explain how it links to a current-carrying wire between magnetic poles and the objective to describe how the strength of the magnetic field around a wire depends on distance from the wire.

• motor-effect force direction: avoid motors and generators

  Treating motors and generators as interchangeable when answering about motor-effect force direction.

  Fix itInstead, identify the exact Unit 4.7 idea in Electromagnetism, then explain how it links to a loudspeaker coil moving in a magnetic field and the objective to describe how shaping a wire to form a solenoid increases the strength of the magnetic field created by a current.

• motor-effect force direction: avoid motors and generators

  Treating motors and generators as interchangeable when answering about motor-effect force direction.

  Fix itInstead, identify the exact Unit 4.7 idea in Electromagnetism, then explain how it links to an alternator producing an AC output trace and the objective to state that the magnetic field inside a solenoid is strong and uniform.

• motor-effect force direction: avoid motors and generators

  Treating motors and generators as interchangeable when answering about motor-effect force direction.

  Fix itInstead, identify the exact Unit 4.7 idea in Electromagnetism, then explain how it links to a dynamo producing a DC output trace and the objective to describe the magnetic field around a solenoid as having a similar shape to that of a bar magnet.

• motor-effect force direction: avoid motors and generators

  Treating motors and generators as interchangeable when answering about motor-effect force direction.

  Fix itInstead, identify the exact Unit 4.7 idea in Electromagnetism, then explain how it links to a moving-coil microphone investigation and the objective to state that adding an iron core increases the strength of the magnetic field of a solenoid.

• motor-effect force direction: avoid motors and generators

  Treating motors and generators as interchangeable when answering about motor-effect force direction.

  Fix itInstead, identify the exact Unit 4.7 idea in Electromagnetism, then explain how it links to a step-up transformer on the National Grid and the objective to define an electromagnet as a solenoid with an iron core.

• motor-effect force direction: avoid motors and generators

  Treating motors and generators as interchangeable when answering about motor-effect force direction.

  Fix itInstead, identify the exact Unit 4.7 idea in Electromagnetism, then explain how it links to a step-down transformer for a low-voltage device and the objective to describe how the magnetic effect of a current can be demonstrated.

• motor-effect force direction: avoid motors and generators

  Treating motors and generators as interchangeable when answering about motor-effect force direction.

  Fix itInstead, identify the exact Unit 4.7 idea in Electromagnetism, then explain how it links to a student comparing motor and generator effects and the objective to draw the magnetic field pattern for a straight wire carrying a current.