Question detail
Which conclusion keeps the magnetism concept boundary clear? Context: classroom plotting compass evidence. Learning objective: (Physics only) (HT only) Identify Vp and Vs as potential differences in volts.. Which answer is most accurate for Transformers (HT only)? Distinct revision anchor: fluxcue733a coilcue733b fieldcue733c polecue733d gridcue733e motorcue733f generatorcue733g transformercue733h compasscue733i currentcue733j voltagecue733k forcecue733l.
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. Transformers (HT only): classroom plotting compass evidence shows (Physics only) (HT only) Identify Vp and Vs as potential differences in volts. 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. (energy-transfer error).
- C. It confuses the magnetic field with an electric field. (field-shape error).
- D. It describes energy transfer but misses the force or field interaction. (current-change error).
Answer
Transformers (HT only): classroom plotting compass evidence shows (Physics only) (HT only) Identify Vp and Vs as potential differences in volts. because magnetic effects depend on field direction, current or changing magnetic flux.
Explanation
Transformers (HT only): classroom plotting compass evidence shows (Physics only) (HT only) Identify Vp and Vs as potential differences in volts. because magnetic effects depend on field direction, current or changing magnetic flux. It is correct because it anchors the response to Transformers (HT only), uses the relevant magnetic field, coil, current or induction evidence, and avoids mixing motor, generator and transformer ideas. The classroom plotting compass evidence detail makes the option distinct from nearby objectives while still testing the same AQA GCSE Physics learning objective. V10 boundary check fluxcue733a coilcue733b fieldcue733c polecue733d gridcue733e motorcue733f generatorcue733g transformercue733h compasscue733i currentcue733j voltagecue733k forcecue733l: 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 Transformers (HT only), then explain how it links to a step-down transformer for a low-voltage device and the objective to identify Vp and Vs as potential differences in volts.
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