Question detail
Which conclusion keeps the magnetism concept boundary clear? Context: classroom plotting compass load-effect. Learning objective: (Physics only) (HT only) Explain how the generator effect is used in a dynamo to generate dc.. Which answer is most accurate for Uses of the generator effect (HT only)? Distinct revision anchor: fluxcue613a coilcue613b fieldcue613c polecue613d gridcue613e motorcue613f generatorcue613g transformercue613h compasscue613i currentcue613j voltagecue613k forcecue613l.
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
- A. Uses of the generator effect (HT only): classroom plotting compass load-effect shows (Physics only) (HT only) Explain how the generator effect is used in a dynamo to generate dc. because magnetic effects depend on field direction, current or changing magnetic flux.
- B. It treats a permanent magnet as if it only works when current flows. (energy-transfer error).
- C. It confuses the magnetic field with an electric field. (field-shape error).
- D. It describes energy transfer but misses the force or field interaction. (current-change error).
Answer
Uses of the generator effect (HT only): classroom plotting compass load-effect shows (Physics only) (HT only) Explain how the generator effect is used in a dynamo to generate dc. because magnetic effects depend on field direction, current or changing magnetic flux.
Explanation
Uses of the generator effect (HT only): classroom plotting compass load-effect shows (Physics only) (HT only) Explain how the generator effect is used in a dynamo to generate dc. 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 classroom plotting compass load-effect detail makes the option distinct from nearby objectives while still testing the same AQA GCSE Physics learning objective. V10 boundary check fluxcue613a coilcue613b fieldcue613c polecue613d gridcue613e motorcue613f generatorcue613g transformercue613h compasscue613i currentcue613j voltagecue613k forcecue613l: 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 current-carrying wire between magnetic poles and the objective to explain how the generator effect is used in a dynamo to generate dc.
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