Select the statement that would earn credit in an AQA GCSE Physics answer. Context: overhead cable transmission 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: fluxcue263a coilcue263b fieldcue263c polecue263d gridcue263e motorcue263f generatorcue263g transformercue263h compasscue263i currentcue263j voltagecue263k forcecue263l.

Magnetic fields: overhead cable transmission 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: overhead cable transmission 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 overhead cable transmission diagnosis detail makes the option distinct from nearby objectives while still testing the same AQA GCSE Physics learning objective. V10 boundary check fluxcue263a coilcue263b fieldcue263c polecue263d gridcue263e motorcue263f generatorcue263g transformercue263h compasscue263i currentcue263j voltagecue263k forcecue263l: 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.