Question detail

Which option gives the strongest diagnostic reason? Context: phone speaker coil power-link. Learning objective: (Physics only) (HT only) Distinguish ac output from dc output using potential difference-time graphs.. Which answer is most accurate for Uses of the generator effect (HT only)? Distinct revision anchor: fluxcue633a coilcue633b fieldcue633c polecue633d gridcue633e motorcue633f generatorcue633g transformercue633h compasscue633i currentcue633j voltagecue633k forcecue633l.

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

At a glance

MCQ

Type

practice

Style

Topic

Induced potential, transformers and the National Grid (physics only) (HT only)

Question

  1. A. Uses of the generator effect (HT only): phone speaker coil power-link shows (Physics only) (HT only) Distinguish ac output from dc output using potential difference-time graphs. because magnetic effects depend on field direction, current or changing magnetic flux.
  2. B. It treats a permanent magnet as if it only works when current flows. (prediction error).
  3. C. It confuses the magnetic field with an electric field. (comparison error).
  4. D. It describes energy transfer but misses the force or field interaction. (safety error).

Answer

Uses of the generator effect (HT only): phone speaker coil power-link shows (Physics only) (HT only) Distinguish ac output from dc output using potential difference-time graphs. because magnetic effects depend on field direction, current or changing magnetic flux.

Explanation

Uses of the generator effect (HT only): phone speaker coil power-link shows (Physics only) (HT only) Distinguish ac output from dc output using potential difference-time graphs. because magnetic effects depend on field direction, current or changing magnetic flux. It is correct because it anchors the response to Uses of the generator effect (HT only), uses the relevant magnetic field, coil, current or induction evidence, and avoids mixing motor, generator and transformer ideas. The phone speaker coil power-link detail makes the option distinct from nearby objectives while still testing the same AQA GCSE Physics learning objective. V10 boundary check fluxcue633a coilcue633b fieldcue633c polecue633d gridcue633e motorcue633f generatorcue633g transformercue633h compasscue633i currentcue633j voltagecue633k forcecue633l: 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

National Grid transformer reasoning: avoid motors and generators

Treating motors and generators as interchangeable when answering about National Grid transformer reasoning.

Instead, identify the exact Unit 4.7 idea in Uses of the generator effect (HT only), then explain how it links to a dynamo producing a DC output trace and the objective to distinguish ac output from dc output using potential difference-time graphs.

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AQA GCSE Physics Induced potential, transformers question detail | ExamCompanion