Question detail
Which response uses the correct technical wording for this situation? Context: alternator output trace AC-output. Learning objective: (Physics only) (HT only) Describe how a potential difference is induced when there is a change in the magnetic field around a conductor.. Which answer is most accurate for Induced potential (HT only)? Distinct revision anchor: fluxcue530a coilcue530b fieldcue530c polecue530d gridcue530e motorcue530f generatorcue530g transformercue530h compasscue530i currentcue530j voltagecue530k forcecue530l.
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. Induced potential (HT only): alternator output trace AC-output shows (Physics only) (HT only) Describe how a potential difference is induced when there is a change in the magnetic field around a conductor. 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
Induced potential (HT only): alternator output trace AC-output shows (Physics only) (HT only) Describe how a potential difference is induced when there is a change in the magnetic field around a conductor. because magnetic effects depend on field direction, current or changing magnetic flux.
Explanation
Induced potential (HT only): alternator output trace AC-output shows (Physics only) (HT only) Describe how a potential difference is induced when there is a change in the magnetic field around a conductor. because magnetic effects depend on field direction, current or changing magnetic flux. It is correct because it anchors the response to Induced potential (HT only), uses the relevant magnetic field, coil, current or induction evidence, and avoids mixing motor, generator and transformer ideas. The alternator output trace AC-output detail makes the option distinct from nearby objectives while still testing the same AQA GCSE Physics learning objective. V10 boundary check fluxcue530a coilcue530b fieldcue530c polecue530d gridcue530e motorcue530f generatorcue530g transformercue530h compasscue530i currentcue530j voltagecue530k forcecue530l: 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 magnetic field...
Treating magnetic field direction and force direction as interchangeable when answering about National Grid transformer reasoning.
Instead, identify the exact Unit 4.7 idea in Induced potential (HT only), then explain how it links to a steel core electromagnet demonstration and the objective to describe how a potential difference is induced when there is a change in the magnetic field around a conductor.
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