Exam-style question
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Select the statement that would earn credit in an AQA GCSE Physics answer. Context: step-up transformer demonstration boundary. Learning objective: Identify iron, steel, cobalt and nickel as magnetic materials named in the specification.. Which answer is most accurate for Magnetic fields? Distinct revision anchor: fluxcue185a coilcue185b fieldcue185c polecue185d gridcue185e motorcue185f generatorcue185g transformercue185h compasscue185i currentcue185j voltagecue185k forcecue185l.
- A.Magnetic fields: step-up transformer demonstration boundary shows Identify iron, steel, cobalt and nickel as magnetic materials named in the specification. 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. (force-link error).
- C.It confuses the magnetic field with an electric field. (turns-ratio error).
- D.It describes energy transfer but misses the force or field interaction. (AC-output error).
Answer and explanation
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Common mistake
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