Question detail
Which conclusion keeps the magnetism concept boundary clear? Context: iron-filings field pattern boundary. Learning objective: (Physics only) (HT only) Explain how the ratio of potential differences across the two coils depends on the ratio of turns on each coil.. Which answer is most accurate for Transformers (HT only)? Distinct revision anchor: fluxcue763a coilcue763b fieldcue763c polecue763d gridcue763e motorcue763f generatorcue763g transformercue763h compasscue763i currentcue763j voltagecue763k forcecue763l.
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): iron-filings field pattern boundary shows (Physics only) (HT only) Explain how the ratio of potential differences across the two coils depends on the ratio of turns on each coil. because magnetic effects depend on field direction, current or changing magnetic flux.
- B. It swaps motor and generator reasoning. (AC-output error).
- C. It describes gravitational force instead of magnetic force. (coil-core error).
- D. It claims induced current is supplied by a cell. (compass-response error).
Answer
Transformers (HT only): iron-filings field pattern boundary shows (Physics only) (HT only) Explain how the ratio of potential differences across the two coils depends on the ratio of turns on each coil. because magnetic effects depend on field direction, current or changing magnetic flux.
Explanation
Transformers (HT only): iron-filings field pattern boundary shows (Physics only) (HT only) Explain how the ratio of potential differences across the two coils depends on the ratio of turns on each coil. 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 iron-filings field pattern boundary detail makes the option distinct from nearby objectives while still testing the same AQA GCSE Physics learning objective. V10 boundary check fluxcue763a coilcue763b fieldcue763c polecue763d gridcue763e motorcue763f generatorcue763g transformercue763h compasscue763i currentcue763j voltagecue763k forcecue763l: 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 AC and DC
Treating AC and DC 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 steel core electromagnet demonstration and the objective to explain how the ratio of potential differences across the two coils depends on the ratio of turns on each coil.
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