Question detail

Which conclusion keeps the magnetism concept boundary clear? Context: iron-filings field pattern boundary. Learning objective: Identify iron, steel, cobalt and nickel as magnetic materials named in the specification.. Which answer is most accurate for Magnetic fields? Distinct revision anchor: fluxcue187a coilcue187b fieldcue187c polecue187d gridcue187e motorcue187f generatorcue187g transformercue187h compasscue187i currentcue187j voltagecue187k forcecue187l.

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

  1. A. Magnetic fields: iron-filings field pattern boundary shows Identify iron, steel, cobalt and nickel as magnetic materials named in the specification. because magnetic effects depend on field direction, current or changing magnetic flux.
  2. B. It swaps motor and generator reasoning. (AC-output error).
  3. C. It describes gravitational force instead of magnetic force. (coil-core error).
  4. D. It claims induced current is supplied by a cell. (compass-response error).

Answer

Magnetic fields: iron-filings field pattern boundary shows Identify iron, steel, cobalt and nickel as magnetic materials named in the specification. because magnetic effects depend on field direction, current or changing magnetic flux.

Explanation

Magnetic fields: iron-filings field pattern boundary shows Identify iron, steel, cobalt and nickel as magnetic materials named in the specification. 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 iron-filings field pattern boundary detail makes the option distinct from nearby objectives while still testing the same AQA GCSE Physics learning objective. V10 boundary check fluxcue187a coilcue187b fieldcue187c polecue187d gridcue187e motorcue187f generatorcue187g transformercue187h compasscue187i currentcue187j voltagecue187k forcecue187l: 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 steel core electromagnet demonstration and the objective to identify iron, steel, cobalt and nickel as magnetic materials named in the specification.

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