Question detail

Which answer avoids the common misconception in this topic? Context: wind-turbine generator direction. Learning objective: Describe how two magnets exert forces on each other when brought close together.. Which answer is most accurate for Poles of a magnet? Distinct revision anchor: fluxcue112a coilcue112b fieldcue112c polecue112d gridcue112e motorcue112f generatorcue112g transformercue112h compasscue112i currentcue112j voltagecue112k forcecue112l.

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: wind-turbine generator direction shows Describe how two magnets exert forces on each other when brought close together. 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. (voltage-change error).
  3. C. It makes AC and DC equivalent. (force-link error).
  4. D. It ignores relative motion or changing magnetic flux. (turns-ratio error).

Answer

Poles of a magnet: wind-turbine generator direction shows Describe how two magnets exert forces on each other when brought close together. because magnetic effects depend on field direction, current or changing magnetic flux.

Explanation

Poles of a magnet: wind-turbine generator direction shows Describe how two magnets exert forces on each other when brought close together. 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 wind-turbine generator direction detail makes the option distinct from nearby objectives while still testing the same AQA GCSE Physics learning objective. V10 boundary check fluxcue112a coilcue112b fieldcue112c polecue112d gridcue112e motorcue112f generatorcue112g transformercue112h compasscue112i currentcue112j voltagecue112k forcecue112l: 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 steel core electromagnet demonstration and the objective to describe how two magnets exert forces on each other when brought close together.

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