Question detail

Select the statement that would earn credit in an AQA GCSE Physics answer. Context: overhead cable transmission safety. Learning objective: Describe how the magnetic effect of a current can be demonstrated.. Which answer is most accurate for Electromagnetism? Distinct revision anchor: fluxcue335a coilcue335b fieldcue335c polecue335d gridcue335e motorcue335f generatorcue335g transformercue335h compasscue335i currentcue335j voltagecue335k forcecue335l.

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: overhead cable transmission safety shows Describe how the magnetic effect of a current can be demonstrated. because magnetic effects depend on field direction, current or changing magnetic flux.
  2. B. It swaps motor and generator reasoning. (load-effect error).
  3. C. It describes gravitational force instead of magnetic force. (power-link error).
  4. D. It claims induced current is supplied by a cell. (exam-command error).

Answer

Electromagnetism: overhead cable transmission safety shows Describe how the magnetic effect of a current can be demonstrated. because magnetic effects depend on field direction, current or changing magnetic flux.

Explanation

Electromagnetism: overhead cable transmission safety shows Describe how the magnetic effect of a current can be demonstrated. 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 overhead cable transmission safety detail makes the option distinct from nearby objectives while still testing the same AQA GCSE Physics learning objective. V10 boundary check fluxcue335a coilcue335b fieldcue335c polecue335d gridcue335e motorcue335f generatorcue335g transformercue335h compasscue335i currentcue335j voltagecue335k forcecue335l: 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 step-down transformer for a low-voltage device and the objective to describe how the magnetic effect of a current can be demonstrated.

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analysis MCQ 4: a current can be demonstrated. | The motor effect… | ExamCompanion