Question detail
Which response uses the correct technical wording for this situation? Context: model railway motor compass-response. Learning objective: (Physics only) (HT only) Explain that the original change may be the movement of the conductor or the change in magnetic field.. Which answer is most accurate for Induced potential (HT only)? Distinct revision anchor: fluxcue560a coilcue560b fieldcue560c polecue560d gridcue560e motorcue560f generatorcue560g transformercue560h compasscue560i currentcue560j voltagecue560k forcecue560l.
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): model railway motor compass-response shows (Physics only) (HT only) Explain that the original change may be the movement of the conductor or the change in magnetic field. 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. (diagnosis error).
- C. It makes AC and DC equivalent. (prediction error).
- D. It ignores relative motion or changing magnetic flux. (comparison error).
Answer
Induced potential (HT only): model railway motor compass-response shows (Physics only) (HT only) Explain that the original change may be the movement of the conductor or the change in magnetic field. because magnetic effects depend on field direction, current or changing magnetic flux.
Explanation
Induced potential (HT only): model railway motor compass-response shows (Physics only) (HT only) Explain that the original change may be the movement of the conductor or the change in magnetic field. 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 model railway motor compass-response detail makes the option distinct from nearby objectives while still testing the same AQA GCSE Physics learning objective. V10 boundary check fluxcue560a coilcue560b fieldcue560c polecue560d gridcue560e motorcue560f generatorcue560g transformercue560h compasscue560i currentcue560j voltagecue560k forcecue560l: 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 dynamo producing a DC output trace and the objective to explain that the original change may be the movement of the conductor or the change in magnetic field.
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