Question detail
Which response uses the correct technical wording for this situation? Context: split-ring motor kit diagnosis. Learning objective: (Physics only) (HT only) Recognise that transformer equations are given on the Physics equation sheet.. Which answer is most accurate for Transformers (HT only)? Distinct revision anchor: fluxcue836a coilcue836b fieldcue836c polecue836d gridcue836e motorcue836f generatorcue836g transformercue836h compasscue836i currentcue836j voltagecue836k forcecue836l.
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 diagnosis shows (Physics only) (HT only) Recognise that transformer equations are given on the Physics equation sheet. 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 diagnosis shows (Physics only) (HT only) Recognise that transformer equations are given on the Physics equation sheet. because magnetic effects depend on field direction, current or changing magnetic flux.
Explanation
Transformers (HT only): split-ring motor kit diagnosis shows (Physics only) (HT only) Recognise that transformer equations are given on the Physics equation sheet. 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 diagnosis detail makes the option distinct from nearby objectives while still testing the same AQA GCSE Physics learning objective. V10 boundary check fluxcue836a coilcue836b fieldcue836c polecue836d gridcue836e motorcue836f generatorcue836g transformercue836h compasscue836i currentcue836j voltagecue836k forcecue836l: 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 steel core electromagnet demonstration and the objective to recognise that transformer equations are given on the Physics equation sheet.
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