Question detail
Which answer avoids the common misconception in this topic? Context: coil-and-galvanometer induction application. Learning objective: Describe the direction of a magnetic field as the direction of the force on a north pole placed at that point.. Which answer is most accurate for Magnetic fields? Distinct revision anchor: fluxcue214a coilcue214b fieldcue214c polecue214d gridcue214e motorcue214f generatorcue214g transformercue214h compasscue214i currentcue214j voltagecue214k forcecue214l.
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. Magnetic fields: coil-and-galvanometer induction application shows Describe the direction of a magnetic field as the direction of the force on a north pole placed at that point. because magnetic effects depend on field direction, current or changing magnetic flux.
- B. It reverses the role of primary and secondary coils. (pole-test error).
- C. It assumes transformers work on direct current without changing flux. (load-effect error).
- D. It states the turns ratio changes resistance rather than voltage. (power-link error).
Answer
Magnetic fields: coil-and-galvanometer induction application shows Describe the direction of a magnetic field as the direction of the force on a north pole placed at that point. because magnetic effects depend on field direction, current or changing magnetic flux.
Explanation
Magnetic fields: coil-and-galvanometer induction application shows Describe the direction of a magnetic field as the direction of the force on a north pole placed at that point. because magnetic effects depend on field direction, current or changing magnetic flux. It is correct because it anchors the response to Magnetic fields, uses the relevant magnetic field, coil, current or induction evidence, and avoids mixing motor, generator and transformer ideas. The coil-and-galvanometer induction application detail makes the option distinct from nearby objectives while still testing the same AQA GCSE Physics learning objective. V10 boundary check fluxcue214a coilcue214b fieldcue214c polecue214d gridcue214e motorcue214f generatorcue214g transformercue214h compasscue214i currentcue214j voltagecue214k forcecue214l: 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 Magnetic fields, then explain how it links to a dynamo producing a DC output trace and the objective to describe the direction of a magnetic field as the direction of the force on a north pole placed at that point.
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