Question detail

Which answer avoids the common misconception in this topic? Context: wind-turbine generator diagnosis. Learning objective: Draw the magnetic field pattern of a bar magnet showing how strength and direction change from one point to another.. Which answer is most accurate for Magnetic fields? Distinct revision anchor: fluxcue256a coilcue256b fieldcue256c polecue256d gridcue256e motorcue256f generatorcue256g transformercue256h compasscue256i currentcue256j voltagecue256k forcecue256l.

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: wind-turbine generator diagnosis shows Draw the magnetic field pattern of a bar magnet showing how strength and direction change from one point to another. 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

Magnetic fields: wind-turbine generator diagnosis shows Draw the magnetic field pattern of a bar magnet showing how strength and direction change from one point to another. because magnetic effects depend on field direction, current or changing magnetic flux.

Explanation

Magnetic fields: wind-turbine generator diagnosis shows Draw the magnetic field pattern of a bar magnet showing how strength and direction change from one point to another. 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 wind-turbine generator diagnosis detail makes the option distinct from nearby objectives while still testing the same AQA GCSE Physics learning objective. V10 boundary check fluxcue256a coilcue256b fieldcue256c polecue256d gridcue256e motorcue256f generatorcue256g transformercue256h compasscue256i currentcue256j voltagecue256k forcecue256l: 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 bar magnet and plotting compass practical and the objective to draw the magnetic field pattern of a bar magnet showing how strength and direction change from one point to another.

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