Question detail
Which option gives the strongest diagnostic reason? Context: primary-secondary coil comparison evidence. Learning objective: Describe the difference between permanent and induced magnets.. Which answer is most accurate for Poles of a magnet? Distinct revision anchor: fluxcue171a coilcue171b fieldcue171c polecue171d gridcue171e motorcue171f generatorcue171g transformercue171h compasscue171i currentcue171j voltagecue171k forcecue171l.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Permanent and induced magnetism, magnetic forces and fields
Question
- A. Poles of a magnet: primary-secondary coil comparison evidence shows Describe the difference between permanent and induced magnets. because magnetic effects depend on field direction, current or changing magnetic flux.
- B. It swaps motor and generator reasoning. (cause error).
- C. It describes gravitational force instead of magnetic force. (evidence error).
- D. It claims induced current is supplied by a cell. (boundary error).
Answer
Poles of a magnet: primary-secondary coil comparison evidence shows Describe the difference between permanent and induced magnets. because magnetic effects depend on field direction, current or changing magnetic flux.
Explanation
Poles of a magnet: primary-secondary coil comparison evidence shows Describe the difference between permanent and induced magnets. because magnetic effects depend on field direction, current or changing magnetic flux. It is correct because it anchors the response to Poles of a magnet, uses the relevant magnetic field, coil, current or induction evidence, and avoids mixing motor, generator and transformer ideas. The primary-secondary coil comparison evidence detail makes the option distinct from nearby objectives while still testing the same AQA GCSE Physics learning objective. V10 boundary check fluxcue171a coilcue171b fieldcue171c polecue171d gridcue171e motorcue171f generatorcue171g transformercue171h compasscue171i currentcue171j voltagecue171k forcecue171l: 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
generator-effect induction: avoid permanent and induced magnets
Treating permanent and induced magnets as interchangeable when answering about generator-effect induction.
Instead, identify the exact Unit 4.7 idea in Poles of a magnet, then explain how it links to a calculation using primary and secondary coils and the objective to describe the difference between permanent and induced magnets.
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