Question detail

Select the statement that would earn credit in an AQA GCSE Physics answer. Context: power-station transformer cause. Learning objective: Describe attraction and repulsion between magnetic poles as non-contact forces.. Which answer is most accurate for Poles of a magnet? Distinct revision anchor: fluxcue131a coilcue131b fieldcue131c polecue131d gridcue131e motorcue131f generatorcue131g transformercue131h compasscue131i currentcue131j voltagecue131k forcecue131l.

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: power-station transformer cause shows Describe attraction and repulsion between magnetic poles as non-contact forces. because magnetic effects depend on field direction, current or changing magnetic flux.
  2. B. It swaps motor and generator reasoning. (safety error).
  3. C. It describes gravitational force instead of magnetic force. (efficiency error).
  4. D. It claims induced current is supplied by a cell. (energy-transfer error).

Answer

Poles of a magnet: power-station transformer cause shows Describe attraction and repulsion between magnetic poles as non-contact forces. because magnetic effects depend on field direction, current or changing magnetic flux.

Explanation

Poles of a magnet: power-station transformer cause shows Describe attraction and repulsion between magnetic poles as non-contact forces. 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 power-station transformer cause detail makes the option distinct from nearby objectives while still testing the same AQA GCSE Physics learning objective. V10 boundary check fluxcue131a coilcue131b fieldcue131c polecue131d gridcue131e motorcue131f generatorcue131g transformercue131h compasscue131i currentcue131j voltagecue131k forcecue131l: 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 an alternator producing an AC output trace and the objective to describe attraction and repulsion between magnetic poles as non-contact forces.

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