Question detail

Which explanation best links the observation to the physics? Context: scrapyard lifting magnet evidence. Learning objective: State that induced magnetism always causes a force of attraction.. Which answer is most accurate for Poles of a magnet? Distinct revision anchor: fluxcue150a coilcue150b fieldcue150c polecue150d gridcue150e motorcue150f generatorcue150g transformercue150h compasscue150i currentcue150j voltagecue150k forcecue150l.

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. Poles of a magnet: scrapyard lifting magnet evidence shows State that induced magnetism always causes a force of attraction. because magnetic effects depend on field direction, current or changing magnetic flux.
  2. B. It reverses the role of primary and secondary coils. (application error).
  3. C. It assumes transformers work on direct current without changing flux. (measurement error).
  4. D. It states the turns ratio changes resistance rather than voltage. (diagnosis error).

Answer

Poles of a magnet: scrapyard lifting magnet evidence shows State that induced magnetism always causes a force of attraction. because magnetic effects depend on field direction, current or changing magnetic flux.

Explanation

Poles of a magnet: scrapyard lifting magnet evidence shows State that induced magnetism always causes a force of attraction. because magnetic effects depend on field direction, current or changing magnetic flux. It is correct because it anchors the response to Poles of a magnet, uses the relevant magnetic field, coil, current or induction evidence, and avoids mixing motor, generator and transformer ideas. The scrapyard lifting magnet evidence detail makes the option distinct from nearby objectives while still testing the same AQA GCSE Physics learning objective. V10 boundary check fluxcue150a coilcue150b fieldcue150c polecue150d gridcue150e motorcue150f generatorcue150g transformercue150h compasscue150i currentcue150j voltagecue150k forcecue150l: 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 Poles of a magnet, then explain how it links to a step-up transformer on the National Grid and the objective to state that induced magnetism always causes a force of attraction.

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