Question detail
Which option gives the strongest diagnostic reason? Context: loudspeaker cone test energy-transfer. Learning objective: (Physics only) Apply WS 1.4 when explaining electromagnetic devices from diagrams.. Which answer is most accurate for Electromagnetism? Distinct revision anchor: fluxcue375a coilcue375b fieldcue375c polecue375d gridcue375e motorcue375f generatorcue375g transformercue375h compasscue375i currentcue375j voltagecue375k forcecue375l.
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. Electromagnetism: loudspeaker cone test energy-transfer shows (Physics only) Apply WS 1.4 when explaining electromagnetic devices from diagrams. because magnetic effects depend on field direction, current or changing magnetic flux.
- B. It swaps motor and generator reasoning. (current-change error).
- C. It describes gravitational force instead of magnetic force. (voltage-change error).
- D. It claims induced current is supplied by a cell. (force-link error).
Answer
Electromagnetism: loudspeaker cone test energy-transfer shows (Physics only) Apply WS 1.4 when explaining electromagnetic devices from diagrams. because magnetic effects depend on field direction, current or changing magnetic flux.
Explanation
Electromagnetism: loudspeaker cone test energy-transfer shows (Physics only) Apply WS 1.4 when explaining electromagnetic devices from diagrams. because magnetic effects depend on field direction, current or changing magnetic flux. It is correct because it anchors the response to Electromagnetism, uses the relevant magnetic field, coil, current or induction evidence, and avoids mixing motor, generator and transformer ideas. The loudspeaker cone test energy-transfer detail makes the option distinct from nearby objectives while still testing the same AQA GCSE Physics learning objective. V10 boundary check fluxcue375a coilcue375b fieldcue375c polecue375d gridcue375e motorcue375f generatorcue375g transformercue375h compasscue375i currentcue375j voltagecue375k forcecue375l: 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 Electromagnetism, then explain how it links to a loudspeaker coil moving in a magnetic field and the objective to apply WS 1.4 when explaining electromagnetic devices from diagrams.
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