Which conclusion keeps the magnetism concept boundary clear? Context: iron-filings field pattern measurement. Learning objective: State that the Earth has a magnetic field.. Which answer is most accurate for Magnetic fields? Distinct revision anchor: fluxcue235a coilcue235b fieldcue235c polecue235d gridcue235e motorcue235f generatorcue235g transformercue235h compasscue235i currentcue235j voltagecue235k forcecue235l.

Magnetic fields: iron-filings field pattern measurement shows State that the Earth has a magnetic field. because magnetic effects depend on field direction, current or changing magnetic flux.

Magnetic fields: iron-filings field pattern measurement shows State that the Earth has a magnetic field. 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 measurement detail makes the option distinct from nearby objectives while still testing the same AQA GCSE Physics learning objective. V10 boundary check fluxcue235a coilcue235b fieldcue235c polecue235d gridcue235e motorcue235f generatorcue235g transformercue235h compasscue235i currentcue235j voltagecue235k forcecue235l: 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.