Which explanation best links the observation to the physics? Context: National Grid substation evidence. Learning objective: (Physics only) (HT only) Identify Vp and Vs as potential differences in volts.. Which answer is most accurate for Transformers (HT only)? Distinct revision anchor: fluxcue732a coilcue732b fieldcue732c polecue732d gridcue732e motorcue732f generatorcue732g transformercue732h compasscue732i currentcue732j voltagecue732k forcecue732l.

Transformers (HT only): National Grid substation evidence shows (Physics only) (HT only) Identify Vp and Vs as potential differences in volts. because magnetic effects depend on field direction, current or changing magnetic flux.

Transformers (HT only): National Grid substation evidence shows (Physics only) (HT only) Identify Vp and Vs as potential differences in volts. because magnetic effects depend on field direction, current or changing magnetic flux. It is correct because it anchors the response to Transformers (HT only), uses the relevant magnetic field, coil, current or induction evidence, and avoids mixing motor, generator and transformer ideas. The National Grid substation evidence detail makes the option distinct from nearby objectives while still testing the same AQA GCSE Physics learning objective. V10 boundary check fluxcue732a coilcue732b fieldcue732c polecue732d gridcue732e motorcue732f generatorcue732g transformercue732h compasscue732i currentcue732j voltagecue732k forcecue732l: 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.