Question detail
Which response uses the correct technical wording for this situation? Context: alternator output trace boundary. Learning objective: (Physics only) (HT only) Calculate primary potential difference, secondary potential difference, primary turns or secondary turns using transformer ratios.. Which answer is most accurate for Transformers (HT only)? Distinct revision anchor: fluxcue770a coilcue770b fieldcue770c polecue770d gridcue770e motorcue770f generatorcue770g transformercue770h compasscue770i currentcue770j voltagecue770k forcecue770l.
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. Transformers (HT only): alternator output trace boundary shows (Physics only) (HT only) Calculate primary potential difference, secondary potential difference, primary turns or secondary turns using transformer ratios. 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
Transformers (HT only): alternator output trace boundary shows (Physics only) (HT only) Calculate primary potential difference, secondary potential difference, primary turns or secondary turns using transformer ratios. because magnetic effects depend on field direction, current or changing magnetic flux.
Explanation
Transformers (HT only): alternator output trace boundary shows (Physics only) (HT only) Calculate primary potential difference, secondary potential difference, primary turns or secondary turns using transformer ratios. because magnetic effects depend on field direction, current or changing magnetic flux. It is correct because it anchors the response to Transformers (HT only), uses the relevant magnetic field, coil, current or induction evidence, and avoids mixing motor, generator and transformer ideas. The alternator output trace boundary detail makes the option distinct from nearby objectives while still testing the same AQA GCSE Physics learning objective. V10 boundary check fluxcue770a coilcue770b fieldcue770c polecue770d gridcue770e motorcue770f generatorcue770g transformercue770h compasscue770i currentcue770j voltagecue770k forcecue770l: 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 primary and secondary...
Treating primary and secondary coils as interchangeable when answering about National Grid transformer reasoning.
Instead, identify the exact Unit 4.7 idea in Transformers (HT only), then explain how it links to a current-carrying wire between magnetic poles and the objective to calculate primary potential difference, secondary potential difference, primary turns or secondary turns using transformer ratios.
Related flashcards
Flashcard 1 of 5
Related practice questions
Question 1 of 5
Choose an answer, get feedback, then move sideways through the set.