Question detail

Which conclusion keeps the magnetism concept boundary clear? Context: school bell electromagnet load-effect. Learning objective: (Physics only) (HT only) Explain how the generator effect is used in an alternator to generate ac.. Which answer is most accurate for Uses of the generator effect (HT only)? Distinct revision anchor: fluxcue607a coilcue607b fieldcue607c polecue607d gridcue607e motorcue607f generatorcue607g transformercue607h compasscue607i currentcue607j voltagecue607k forcecue607l.

Try the question, check the answer, then read the explanation to understand the curriculum point.

At a glance

MCQ

Type

practice

Style

Topic

Induced potential, transformers and the National Grid (physics only) (HT only)

Question

  1. A. Uses of the generator effect (HT only): school bell electromagnet load-effect shows (Physics only) (HT only) Explain how the generator effect is used in an alternator to generate ac. because magnetic effects depend on field direction, current or changing magnetic flux.
  2. B. It swaps motor and generator reasoning. (measurement error).
  3. C. It describes gravitational force instead of magnetic force. (diagnosis error).
  4. D. It claims induced current is supplied by a cell. (prediction error).

Answer

Uses of the generator effect (HT only): school bell electromagnet load-effect shows (Physics only) (HT only) Explain how the generator effect is used in an alternator to generate ac. because magnetic effects depend on field direction, current or changing magnetic flux.

Explanation

Uses of the generator effect (HT only): school bell electromagnet load-effect shows (Physics only) (HT only) Explain how the generator effect is used in an alternator to generate ac. because magnetic effects depend on field direction, current or changing magnetic flux. It is correct because it anchors the response to Uses of the generator effect (HT only), uses the relevant magnetic field, coil, current or induction evidence, and avoids mixing motor, generator and transformer ideas. The school bell electromagnet load-effect detail makes the option distinct from nearby objectives while still testing the same AQA GCSE Physics learning objective. V10 boundary check fluxcue607a coilcue607b fieldcue607c polecue607d gridcue607e motorcue607f generatorcue607g transformercue607h compasscue607i currentcue607j voltagecue607k forcecue607l: 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

National Grid transformer reasoning: avoid motors and generators

Treating motors and generators as interchangeable when answering about National Grid transformer reasoning.

Instead, identify the exact Unit 4.7 idea in Uses of the generator effect (HT only), then explain how it links to a steel core electromagnet demonstration and the objective to explain how the generator effect is used in an alternator to generate ac.

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