Question detail
Which response uses the correct technical wording for this situation? Context: alternator output trace pole-test. Learning objective: (Physics only) (HT only) State that the generator effect is used in a dynamo to generate direct current.. Which answer is most accurate for Uses of the generator effect (HT only)? Distinct revision anchor: fluxcue602a coilcue602b fieldcue602c polecue602d gridcue602e motorcue602f generatorcue602g transformercue602h compasscue602i currentcue602j voltagecue602k forcecue602l.
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): alternator output trace pole-test shows (Physics only) (HT only) State that the generator effect is used in a dynamo to generate direct current. because magnetic effects depend on field direction, current or changing magnetic flux.
- B. It reverses the role of primary and secondary coils. (direction error).
- C. It assumes transformers work on direct current without changing flux. (cause error).
- D. It states the turns ratio changes resistance rather than voltage. (evidence error).
Answer
Uses of the generator effect (HT only): alternator output trace pole-test shows (Physics only) (HT only) State that the generator effect is used in a dynamo to generate direct current. because magnetic effects depend on field direction, current or changing magnetic flux.
Explanation
Uses of the generator effect (HT only): alternator output trace pole-test shows (Physics only) (HT only) State that the generator effect is used in a dynamo to generate direct current. 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 alternator output trace pole-test detail makes the option distinct from nearby objectives while still testing the same AQA GCSE Physics learning objective. V10 boundary check fluxcue602a coilcue602b fieldcue602c polecue602d gridcue602e motorcue602f generatorcue602g transformercue602h compasscue602i currentcue602j voltagecue602k forcecue602l: 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 bar magnet and plotting compass practical and the objective to state that the generator effect is used in a dynamo to generate direct current.
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