Question detail

Which answer avoids the common misconception in this topic? Context: temporary induced magnet energy-transfer. Learning objective: (HT only) State that the magnet producing the field and the conductor exert a force on each other.. Which answer is most accurate for Fleming's left-hand rule (HT only)? Distinct revision anchor: fluxcue388a coilcue388b fieldcue388c polecue388d gridcue388e motorcue388f generatorcue388g transformercue388h compasscue388i currentcue388j voltagecue388k forcecue388l.

Try the question, check the answer, then read the explanation to understand the curriculum point.

At a glance

MCQ

Type

practice

Style

Topic

The motor effect

Question

  1. A. Fleming's left-hand rule (HT only): temporary induced magnet energy-transfer shows (HT only) State that the magnet producing the field and the conductor exert a force on each other. because magnetic effects depend on field direction, current or changing magnetic flux.
  2. B. It says field lines travel from south to north outside the magnet. (evidence error).
  3. C. It makes AC and DC equivalent. (boundary error).
  4. D. It ignores relative motion or changing magnetic flux. (application error).

Answer

Fleming's left-hand rule (HT only): temporary induced magnet energy-transfer shows (HT only) State that the magnet producing the field and the conductor exert a force on each other. because magnetic effects depend on field direction, current or changing magnetic flux.

Explanation

Fleming's left-hand rule (HT only): temporary induced magnet energy-transfer shows (HT only) State that the magnet producing the field and the conductor exert a force on each other. because magnetic effects depend on field direction, current or changing magnetic flux. It is correct because it anchors the response to Fleming's left-hand rule (HT only), uses the relevant magnetic field, coil, current or induction evidence, and avoids mixing motor, generator and transformer ideas. The temporary induced magnet energy-transfer detail makes the option distinct from nearby objectives while still testing the same AQA GCSE Physics learning objective. V10 boundary check fluxcue388a coilcue388b fieldcue388c polecue388d gridcue388e motorcue388f generatorcue388g transformercue388h compasscue388i currentcue388j voltagecue388k forcecue388l: in the motor effect, the force is perpendicular to the current and magnetic field; in a generator, relative motion or a changing magnetic field induces a potential difference or induced current; outside a magnet, magnetic field lines go from north to south; AC alternating current changes direction, while DC direct current flows in one direction and needs a commutator in a DC generator context.

Common mistake

motor-effect force direction: avoid motors and generators

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

Instead, 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.

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recall MCQ 1: a force on each other. | The motor effect | AQA… | ExamCompanion