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 calculation using primary and secondary coils and the objective to draw the magnetic field pattern for a solenoid, showing the direction of the field.

• 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 explain how a solenoid arrangement can increase the magnetic effect of the 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 a steel core electromagnet demonstration and the objective to apply WS 2.2 when drawing magnetic field patterns for a current-carrying wire and 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 current-carrying wire between magnetic poles and the objective to interpret diagrams of electromagnetic devices in order to explain how they work.

• 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 apply WS 1.4 when explaining electromagnetic devices from diagrams.

• 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 Fleming's left-hand rule (HT only), then explain how it links to an alternator producing an AC output trace and the objective to describe the motor effect as the force on a current-carrying conductor placed in a magnetic field.

• 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 Fleming's left-hand rule (HT only), then explain how it links to a dynamo producing a DC output trace and the objective to state that the magnet producing the field and the conductor exert a force on each other.

• 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 Fleming's left-hand rule (HT only), then explain how it links to a moving-coil microphone investigation and the objective to use Fleming's left-hand rule to represent the relative orientation of force, current and magnetic field.

• 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 Fleming's left-hand rule (HT only), then explain how it links to a step-up transformer on the National Grid and the objective to recall the factors that affect the size of the force on a current-carrying conductor.

• 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 Fleming's left-hand rule (HT only), then explain how it links to a step-down transformer for a low-voltage device and the objective to recall that the force depends on magnetic flux density, current and length of conductor in the field when the conductor is at right angles to the field.