Which explanation best links the observation to the physics? Context: National Grid substation power-link. Learning objective: (Physics only) (HT only) Distinguish ac output from dc output using potential difference-time graphs.. Which answer is most accurate for Uses of the generator effect (HT only)? Distinct revision anchor: fluxcue636a coilcue636b fieldcue636c polecue636d gridcue636e motorcue636f generatorcue636g transformercue636h compasscue636i currentcue636j voltagecue636k forcecue636l.

Uses of the generator effect (HT only): National Grid substation power-link shows (Physics only) (HT only) Distinguish ac output from dc output using potential difference-time graphs. because magnetic effects depend on field direction, current or changing magnetic flux.

Uses of the generator effect (HT only): National Grid substation power-link shows (Physics only) (HT only) Distinguish ac output from dc output using potential difference-time graphs. because magnetic effects depend on field direction, current or changing magnetic flux. It is correct because it anchors the response to Uses of the generator effect (HT only), uses the relevant magnetic field, coil, current or induction evidence, and avoids mixing motor, generator and transformer ideas. The National Grid substation power-link detail makes the option distinct from nearby objectives while still testing the same AQA GCSE Physics learning objective. V10 boundary check fluxcue636a coilcue636b fieldcue636c polecue636d gridcue636e motorcue636f generatorcue636g transformercue636h compasscue636i currentcue636j voltagecue636k forcecue636l: 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.