Question detail
Which conclusion keeps the magnetism concept boundary clear? Context: moving-wire motor effect AC-output. Learning objective: (Physics only) (HT only) Describe how a potential difference is induced when there is a change in the magnetic field around a conductor.. Which answer is most accurate for Induced potential (HT only)? Distinct revision anchor: fluxcue529a coilcue529b fieldcue529c polecue529d gridcue529e motorcue529f generatorcue529g transformercue529h compasscue529i currentcue529j voltagecue529k forcecue529l.
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): moving-wire motor effect AC-output shows (Physics only) (HT only) Describe how a potential difference is induced when there is a change in the magnetic field around a conductor. because magnetic effects depend on field direction, current or changing magnetic flux.
- B. It treats a permanent magnet as if it only works when current flows. (exam-command error).
- C. It confuses the magnetic field with an electric field. (direction error).
- D. It describes energy transfer but misses the force or field interaction. (cause error).
Answer
Induced potential (HT only): moving-wire motor effect AC-output shows (Physics only) (HT only) Describe how a potential difference is induced when there is a change in the magnetic field around a conductor. because magnetic effects depend on field direction, current or changing magnetic flux.
Explanation
Induced potential (HT only): moving-wire motor effect AC-output shows (Physics only) (HT only) Describe how a potential difference is induced when there is a change in the magnetic field around a conductor. 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 moving-wire motor effect AC-output detail makes the option distinct from nearby objectives while still testing the same AQA GCSE Physics learning objective. V10 boundary check fluxcue529a coilcue529b fieldcue529c polecue529d gridcue529e motorcue529f generatorcue529g transformercue529h compasscue529i currentcue529j voltagecue529k forcecue529l: 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 steel core electromagnet demonstration and the objective to describe how a potential difference is induced when there is a change in the magnetic field around a conductor.
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