Question detail
Which response uses the correct technical wording for this situation? Context: split-ring motor kit direction. Learning objective: (Physics only) (HT only) State that iron is used in the core because it is easily magnetised.. Which answer is most accurate for Transformers (HT only)? Distinct revision anchor: fluxcue692a coilcue692b fieldcue692c polecue692d gridcue692e motorcue692f generatorcue692g transformercue692h compasscue692i currentcue692j voltagecue692k forcecue692l.
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): split-ring motor kit direction shows (Physics only) (HT only) State that iron is used in the core because it is easily magnetised. because magnetic effects depend on field direction, current or changing magnetic flux.
- B. It says field lines travel from south to north outside the magnet. (coil-core error).
- C. It makes AC and DC equivalent. (compass-response error).
- D. It ignores relative motion or changing magnetic flux. (pole-test error).
Answer
Transformers (HT only): split-ring motor kit direction shows (Physics only) (HT only) State that iron is used in the core because it is easily magnetised. because magnetic effects depend on field direction, current or changing magnetic flux.
Explanation
Transformers (HT only): split-ring motor kit direction shows (Physics only) (HT only) State that iron is used in the core because it is easily magnetised. 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 split-ring motor kit direction detail makes the option distinct from nearby objectives while still testing the same AQA GCSE Physics learning objective. V10 boundary check fluxcue692a coilcue692b fieldcue692c polecue692d gridcue692e motorcue692f generatorcue692g transformercue692h compasscue692i currentcue692j voltagecue692k forcecue692l: 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 Transformers (HT only), then explain how it links to a current-carrying wire between magnetic poles and the objective to state that iron is used in the core because it is easily magnetised.
Related flashcards
Flashcard 1 of 5
Related practice questions
Question 1 of 5
Choose an answer, get feedback, then move sideways through the set.
