Question detail
Select the statement that would earn credit in an AQA GCSE Physics answer. Context: step-up transformer demonstration application. Learning objective: State that a magnetic field is strongest at the poles of a magnet.. Which answer is most accurate for Magnetic fields? Distinct revision anchor: fluxcue209a coilcue209b fieldcue209c polecue209d gridcue209e motorcue209f generatorcue209g transformercue209h compasscue209i currentcue209j voltagecue209k forcecue209l.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Permanent and induced magnetism, magnetic forces and fields
Question
- A. Magnetic fields: step-up transformer demonstration application shows State that a magnetic field is strongest at the poles of a magnet. 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
Magnetic fields: step-up transformer demonstration application shows State that a magnetic field is strongest at the poles of a magnet. because magnetic effects depend on field direction, current or changing magnetic flux.
Explanation
Magnetic fields: step-up transformer demonstration application shows State that a magnetic field is strongest at the poles of a magnet. because magnetic effects depend on field direction, current or changing magnetic flux. It is correct because it anchors the response to Magnetic fields, uses the relevant magnetic field, coil, current or induction evidence, and avoids mixing motor, generator and transformer ideas. The step-up transformer demonstration application detail makes the option distinct from nearby objectives while still testing the same AQA GCSE Physics learning objective. V10 boundary check fluxcue209a coilcue209b fieldcue209c polecue209d gridcue209e motorcue209f generatorcue209g transformercue209h compasscue209i currentcue209j voltagecue209k forcecue209l: 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
generator-effect induction: avoid permanent and induced magnets
Treating permanent and induced magnets as interchangeable when answering about generator-effect induction.
Instead, identify the exact Unit 4.7 idea in Magnetic fields, then explain how it links to an alternator producing an AC output trace and the objective to state that a magnetic field is strongest at the poles of a magnet.
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