Question detail
Which response uses the correct technical wording for this situation? Context: model railway motor coil-core. Learning objective: (Physics only) (HT only) State that a current is induced if the conductor is part of a complete circuit.. Which answer is most accurate for Induced potential (HT only)? Distinct revision anchor: fluxcue536a coilcue536b fieldcue536c polecue536d gridcue536e motorcue536f generatorcue536g transformercue536h compasscue536i currentcue536j voltagecue536k forcecue536l.
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): model railway motor coil-core shows (Physics only) (HT only) State that a current is induced if the conductor is part of a complete circuit. 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. (diagnosis error).
- C. It makes AC and DC equivalent. (prediction error).
- D. It ignores relative motion or changing magnetic flux. (comparison error).
Answer
Induced potential (HT only): model railway motor coil-core shows (Physics only) (HT only) State that a current is induced if the conductor is part of a complete circuit. because magnetic effects depend on field direction, current or changing magnetic flux.
Explanation
Induced potential (HT only): model railway motor coil-core shows (Physics only) (HT only) State that a current is induced if the conductor is part of a complete circuit. 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 model railway motor coil-core detail makes the option distinct from nearby objectives while still testing the same AQA GCSE Physics learning objective. V10 boundary check fluxcue536a coilcue536b fieldcue536c polecue536d gridcue536e motorcue536f generatorcue536g transformercue536h compasscue536i currentcue536j voltagecue536k forcecue536l: 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 current-carrying wire between magnetic poles and the objective to state that a current is induced if the conductor is part of a complete circuit.
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