Question detail

Which response uses the correct technical wording for this situation? Context: model railway motor measurement. Learning objective: State that magnetic field lines go from the north-seeking pole to the south-seeking pole of a magnet.. Which answer is most accurate for Magnetic fields? Distinct revision anchor: fluxcue224a coilcue224b fieldcue224c polecue224d gridcue224e motorcue224f generatorcue224g transformercue224h compasscue224i currentcue224j voltagecue224k forcecue224l.

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

At a glance

MCQ

Type

practice

Style

Topic

Permanent and induced magnetism, magnetic forces and fields

Question

  1. A. Magnetic fields: model railway motor measurement shows State that magnetic field lines go from the north-seeking pole to the south-seeking pole of a magnet. 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. (diagnosis error).
  3. C. It makes AC and DC equivalent. (prediction error).
  4. D. It ignores relative motion or changing magnetic flux. (comparison error).

Answer

Magnetic fields: model railway motor measurement shows State that magnetic field lines go from the north-seeking pole to the south-seeking pole of a magnet. because magnetic effects depend on field direction, current or changing magnetic flux.

Explanation

Magnetic fields: model railway motor measurement shows State that magnetic field lines go from the north-seeking pole to the south-seeking pole of a magnet. because magnetic effects depend on field direction, current or changing magnetic flux. It is correct because it anchors the response to Magnetic fields, uses the relevant magnetic field, coil, current or induction evidence, and avoids mixing motor, generator and transformer ideas. The model railway motor measurement detail makes the option distinct from nearby objectives while still testing the same AQA GCSE Physics learning objective. V10 boundary check fluxcue224a coilcue224b fieldcue224c polecue224d gridcue224e motorcue224f generatorcue224g transformercue224h compasscue224i currentcue224j voltagecue224k forcecue224l: 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

generator-effect induction: avoid permanent and induced magnets

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

Instead, 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.

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