Question detail
Select the statement that would earn credit in an AQA GCSE Physics answer. Context: step-up transformer demonstration efficiency. Learning objective: Explain how a solenoid arrangement can increase the magnetic effect of the current.. Which answer is most accurate for Electromagnetism? Distinct revision anchor: fluxcue353a coilcue353b fieldcue353c polecue353d gridcue353e motorcue353f generatorcue353g transformercue353h compasscue353i currentcue353j voltagecue353k forcecue353l.
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: step-up transformer demonstration efficiency shows Explain how a solenoid arrangement can increase the magnetic effect of the current. 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. (force-link error).
- C. It confuses the magnetic field with an electric field. (turns-ratio error).
- D. It describes energy transfer but misses the force or field interaction. (AC-output error).
Answer
Electromagnetism: step-up transformer demonstration efficiency shows Explain how a solenoid arrangement can increase the magnetic effect of the current. because magnetic effects depend on field direction, current or changing magnetic flux.
Explanation
Electromagnetism: step-up transformer demonstration efficiency shows Explain how a solenoid arrangement can increase the magnetic effect of the current. 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 step-up transformer demonstration efficiency detail makes the option distinct from nearby objectives while still testing the same AQA GCSE Physics learning objective. V10 boundary check fluxcue353a coilcue353b fieldcue353c polecue353d gridcue353e motorcue353f generatorcue353g transformercue353h compasscue353i currentcue353j voltagecue353k forcecue353l: 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 bar magnet and plotting compass practical and the objective to explain how a solenoid arrangement can increase the magnetic effect of the current.
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