Which explanation best links the observation to the physics? Context: National Grid substation diagnosis. Learning objective: Describe how to plot the magnetic field pattern of a magnet using a compass.. Which answer is most accurate for Magnetic fields? Distinct revision anchor: fluxcue252a coilcue252b fieldcue252c polecue252d gridcue252e motorcue252f generatorcue252g transformercue252h compasscue252i currentcue252j voltagecue252k forcecue252l.

Magnetic fields: National Grid substation diagnosis shows Describe how to plot the magnetic field pattern of a magnet using a compass. because magnetic effects depend on field direction, current or changing magnetic flux.

Magnetic fields: National Grid substation diagnosis shows Describe how to plot the magnetic field pattern of a magnet using a compass. 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 National Grid substation diagnosis detail makes the option distinct from nearby objectives while still testing the same AQA GCSE Physics learning objective. V10 boundary check fluxcue252a coilcue252b fieldcue252c polecue252d gridcue252e motorcue252f generatorcue252g transformercue252h compasscue252i currentcue252j voltagecue252k forcecue252l: 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.