Question detail
Which response uses the correct technical wording for this situation? Context: model railway motor energy-transfer. Learning objective: (Physics only) Interpret diagrams of electromagnetic devices in order to explain how they work.. Which answer is most accurate for Electromagnetism? Distinct revision anchor: fluxcue368a coilcue368b fieldcue368c polecue368d gridcue368e motorcue368f generatorcue368g transformercue368h compasscue368i currentcue368j voltagecue368k forcecue368l.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
The motor effect
Question
- A. Electromagnetism: model railway motor energy-transfer shows (Physics only) Interpret diagrams of electromagnetic devices in order to explain how they work. 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
Electromagnetism: model railway motor energy-transfer shows (Physics only) Interpret diagrams of electromagnetic devices in order to explain how they work. because magnetic effects depend on field direction, current or changing magnetic flux.
Explanation
Electromagnetism: model railway motor energy-transfer shows (Physics only) Interpret diagrams of electromagnetic devices in order to explain how they work. because magnetic effects depend on field direction, current or changing magnetic flux. It is correct because it anchors the response to Electromagnetism, uses the relevant magnetic field, coil, current or induction evidence, and avoids mixing motor, generator and transformer ideas. The model railway motor energy-transfer detail makes the option distinct from nearby objectives while still testing the same AQA GCSE Physics learning objective. V10 boundary check fluxcue368a coilcue368b fieldcue368c polecue368d gridcue368e motorcue368f generatorcue368g transformercue368h compasscue368i currentcue368j voltagecue368k forcecue368l: 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
motor-effect force direction: avoid motors and generators
Treating motors and generators as interchangeable when answering about motor-effect force direction.
Instead, identify the exact Unit 4.7 idea in Electromagnetism, then explain how it links to a current-carrying wire between magnetic poles and the objective to interpret diagrams of electromagnetic devices in order to explain how they work.
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