Which conclusion keeps the magnetism concept boundary clear? Context: moving-wire motor effect diagnosis. Learning objective: Explain how the behaviour of a magnetic compass is evidence that the core of the Earth must be magnetic.. Which answer is most accurate for Magnetic fields? Distinct revision anchor: fluxcue265a coilcue265b fieldcue265c polecue265d gridcue265e motorcue265f generatorcue265g transformercue265h compasscue265i currentcue265j voltagecue265k forcecue265l.

Magnetic fields: moving-wire motor effect diagnosis shows Explain how the behaviour of a magnetic compass is evidence that the core of the Earth must be magnetic. because magnetic effects depend on field direction, current or changing magnetic flux.

Magnetic fields: moving-wire motor effect diagnosis shows Explain how the behaviour of a magnetic compass is evidence that the core of the Earth must be magnetic. 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 moving-wire motor effect diagnosis detail makes the option distinct from nearby objectives while still testing the same AQA GCSE Physics learning objective. V10 boundary check fluxcue265a coilcue265b fieldcue265c polecue265d gridcue265e motorcue265f generatorcue265g transformercue265h compasscue265i currentcue265j voltagecue265k forcecue265l: 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.