Question detail

Select the statement that would earn credit in an AQA GCSE Physics answer. Context: bench-top compass mapping comparison. Learning objective: Describe how the strength of the magnetic field around a wire depends on distance from the wire.. Which answer is most accurate for Electromagnetism? Distinct revision anchor: fluxcue293a coilcue293b fieldcue293c polecue293d gridcue293e motorcue293f generatorcue293g transformercue293h compasscue293i currentcue293j voltagecue293k forcecue293l.

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

  1. A. Electromagnetism: bench-top compass mapping comparison shows Describe how the strength of the magnetic field around a wire depends on distance from the wire. because magnetic effects depend on field direction, current or changing magnetic flux.
  2. B. It treats a permanent magnet as if it only works when current flows. (boundary error).
  3. C. It confuses the magnetic field with an electric field. (application error).
  4. D. It describes energy transfer but misses the force or field interaction. (measurement error).

Answer

Electromagnetism: bench-top compass mapping comparison shows Describe how the strength of the magnetic field around a wire depends on distance from the wire. because magnetic effects depend on field direction, current or changing magnetic flux.

Explanation

Electromagnetism: bench-top compass mapping comparison shows Describe how the strength of the magnetic field around a wire depends on distance from the wire. 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 bench-top compass mapping comparison detail makes the option distinct from nearby objectives while still testing the same AQA GCSE Physics learning objective. V10 boundary check fluxcue293a coilcue293b fieldcue293c polecue293d gridcue293e motorcue293f generatorcue293g transformercue293h compasscue293i currentcue293j voltagecue293k forcecue293l: 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 current-carrying wire between magnetic poles and the objective to describe how the strength of the magnetic field around a wire depends on distance from the wire.

Related flashcards

Flashcard 1 of 5

Press Space to flip, arrows to move

Related practice questions

Question 1 of 5

Choose an answer, get feedback, then move sideways through the set.

0 of 4 attempted