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Motor effect and direction

Motor effect and direction

Magnetic motor effect diagram with field downward from a north pole to a south pole, current to the right, force into the page, and an inset showing Fleming's left-hand rule.

When a current-carrying wire is placed in a magnetic field, it experiences a force. This is the motor effect, caused by the wire's own magnetic field interacting with the external field.

Magnetic flux density (A-level only) Lesson

  1. A Level
  2. /Physics
  3. /Magnetic flux density (A-level only)

Step-by-step lessons on AQA A Level Physics Magnetic flux density (A-level only). Each one builds up to exam-style questions. Physics is one of the most mathematically demanding A Levels -- at least 40% of the marks require maths skills at Level 2 (GCSE) standard or above, so build calculation and graph-handling fluency alongside the conceptual content from the start.

Lessons