Question detail
Which answer avoids the common misconception in this topic? Context: temporary induced magnet cause. Learning objective: (Physics only) (HT only) Recall and apply the transformer equation Vp / Vs = np / ns.. Which answer is most accurate for Transformers (HT only)? Distinct revision anchor: fluxcue724a coilcue724b fieldcue724c polecue724d gridcue724e motorcue724f generatorcue724g transformercue724h compasscue724i currentcue724j voltagecue724k forcecue724l.
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): temporary induced magnet cause shows (Physics only) (HT only) Recall and apply the transformer equation Vp / Vs = np / ns. 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. (evidence error).
- C. It makes AC and DC equivalent. (boundary error).
- D. It ignores relative motion or changing magnetic flux. (application error).
Answer
Transformers (HT only): temporary induced magnet cause shows (Physics only) (HT only) Recall and apply the transformer equation Vp / Vs = np / ns. because magnetic effects depend on field direction, current or changing magnetic flux.
Explanation
Transformers (HT only): temporary induced magnet cause shows (Physics only) (HT only) Recall and apply the transformer equation Vp / Vs = np / ns. 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 temporary induced magnet cause detail makes the option distinct from nearby objectives while still testing the same AQA GCSE Physics learning objective. V10 boundary check fluxcue724a coilcue724b fieldcue724c polecue724d gridcue724e motorcue724f generatorcue724g transformercue724h compasscue724i currentcue724j voltagecue724k forcecue724l: 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-up transformer on the National Grid and the objective to recall and apply the transformer equation Vp / Vs = np / ns.
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