Which explanation best links the observation to the physics? Context: step-down charger transformer 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: fluxcue186a coilcue186b fieldcue186c polecue186d gridcue186e motorcue186f generatorcue186g transformercue186h compasscue186i currentcue186j voltagecue186k forcecue186l.

Magnetic fields: step-down charger transformer 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.

Magnetic fields: step-down charger transformer 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 step-down charger transformer boundary detail makes the option distinct from nearby objectives while still testing the same AQA GCSE Physics learning objective. V10 boundary check fluxcue186a coilcue186b fieldcue186c polecue186d gridcue186e motorcue186f generatorcue186g transformercue186h compasscue186i currentcue186j voltagecue186k forcecue186l: 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.