Question detail

Which answer avoids the common misconception in this topic? Context: coil-and-galvanometer induction load-effect. Learning objective: (Physics only) (HT only) Draw graphs of potential difference generated in a coil against time.. Which answer is most accurate for Uses of the generator effect (HT only)? Distinct revision anchor: fluxcue622a coilcue622b fieldcue622c polecue622d gridcue622e motorcue622f generatorcue622g transformercue622h compasscue622i currentcue622j voltagecue622k forcecue622l.

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): coil-and-galvanometer induction load-effect shows (Physics only) (HT only) Draw graphs of potential difference generated in a coil against time. because magnetic effects depend on field direction, current or changing magnetic flux.
  2. B. It reverses the role of primary and secondary coils. (pole-test error).
  3. C. It assumes transformers work on direct current without changing flux. (load-effect error).
  4. D. It states the turns ratio changes resistance rather than voltage. (power-link error).

Answer

Uses of the generator effect (HT only): coil-and-galvanometer induction load-effect shows (Physics only) (HT only) Draw graphs of potential difference generated in a coil against time. because magnetic effects depend on field direction, current or changing magnetic flux.

Explanation

Uses of the generator effect (HT only): coil-and-galvanometer induction load-effect shows (Physics only) (HT only) Draw graphs of potential difference generated in a coil against time. 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 coil-and-galvanometer induction load-effect detail makes the option distinct from nearby objectives while still testing the same AQA GCSE Physics learning objective. V10 boundary check fluxcue622a coilcue622b fieldcue622c polecue622d gridcue622e motorcue622f generatorcue622g transformercue622h compasscue622i currentcue622j voltagecue622k forcecue622l: 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 loudspeaker coil moving in a magnetic field and the objective to draw graphs of potential difference generated in a coil against time.

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