Question detail
Which option gives the strongest diagnostic reason? Context: solenoid strength investigation turns-ratio. Learning objective: (Physics only) (HT only) Explain how a moving-coil loudspeaker works.. Which answer is most accurate for Loudspeakers (physics only) (HT only)? Distinct revision anchor: fluxcue501a coilcue501b fieldcue501c polecue501d gridcue501e motorcue501f generatorcue501g transformercue501h compasscue501i currentcue501j voltagecue501k forcecue501l.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
The motor effect
Question
- A. Loudspeakers (physics only) (HT only): solenoid strength investigation turns-ratio shows (Physics only) (HT only) Explain how a moving-coil loudspeaker works. 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. (compass-response error).
- C. It confuses the magnetic field with an electric field. (pole-test error).
- D. It describes energy transfer but misses the force or field interaction. (load-effect error).
Answer
Loudspeakers (physics only) (HT only): solenoid strength investigation turns-ratio shows (Physics only) (HT only) Explain how a moving-coil loudspeaker works. because magnetic effects depend on field direction, current or changing magnetic flux.
Explanation
Loudspeakers (physics only) (HT only): solenoid strength investigation turns-ratio shows (Physics only) (HT only) Explain how a moving-coil loudspeaker works. because magnetic effects depend on field direction, current or changing magnetic flux. It is correct because it anchors the response to Loudspeakers (physics only) (HT only), uses the relevant magnetic field, coil, current or induction evidence, and avoids mixing motor, generator and transformer ideas. The solenoid strength investigation turns-ratio detail makes the option distinct from nearby objectives while still testing the same AQA GCSE Physics learning objective. V10 boundary check fluxcue501a coilcue501b fieldcue501c polecue501d gridcue501e motorcue501f generatorcue501g transformercue501h compasscue501i currentcue501j voltagecue501k forcecue501l: 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
motor-effect force direction: avoid motors and generators
Treating motors and generators as interchangeable when answering about motor-effect force direction.
Instead, identify the exact Unit 4.7 idea in Loudspeakers (physics only) (HT only), then explain how it links to a calculation using primary and secondary coils and the objective to explain how a moving-coil loudspeaker works.
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